Hvac Service Near Me: Discover Trustworthy Heating & Cooling System Repairs Near To Your Place

Kinds Of A/c Repair Work Providers You Can Count On

Ever questioned why your ac system suddenly stops blowing cold air on the most popular day of the year? Or why the heater seems to sputter more than warm your home when winter bites? These are familiar headaches for anyone looking for Heating and cooling Repair Near Me. The obstacles do not stop there: weird noises, changing temperatures, or inefficient air flow can turn comfort into chaos.

Fortunately, Bold City Heating and Air deals with these concerns head-on, using a spectrum of specialized repair services that transform pain into cozy relief. Bold City Heating and Air. Here's a glance at the core services they master:

1. Air Conditioning Repair Work: From refrigerant leaks to compressor failures, every component is scrutinized and repaired to bring back cool air flow.
2. Heating System Repair: Whether it's a faulty thermostat or a damaged heater igniter, no cold night goes unaddressed.
3. Ductwork Repair work: Leaky ducts can squander energy and reduce indoor air quality. Repairing these hidden offenders is a video game changer.
4. Thermostat Calibration: Accuracy in temperature control guarantees your system runs efficiently, saving energy and money.
5. Emergency Situation Heating And Cooling Providers: When your system stops working suddenly, prompt repairs reduce downtime and discomfort.

Envision walking into your home after a blistering day, greeted by a fresh, completely conditioned breeze. Or curling up on a frosty night, confident your heating will not betray you. These aren't just dreams-- Bold City Heating and Air makes them reality with every repair work.

Why go for less when the very best a/c repair work near me can manage everything from small problems to significant malfunctions? Bold City Heating and Air doesn't just repair systems-- they bring back comfort and convenience to your home.

Typical Heating And Cooling Issues and Solutions

When your a/c unit sputters and stalls on the hottest day, it seems like the universe is playing a terrible joke. Among the most frequent offenders? A stopped up air filter. Dust, animal hair, and particles choke the air flow, requiring your system to work overtime and eventually fail. Ever question why your energy costs suddenly increase? That's your a/c system gasping under pressure.

Bold City Heating and Air comprehends the subtle signs that frequently go unnoticed till it's almost far too late. A whisper of odd sounds or a faint burning odor can signify internal concerns that, if addressed promptly, prevent pricey replacements.

Leading Heating And Cooling Issues Decoded

• Refrigerant leakages-- Invisible yet impactful, these leakages weaken cooling performance and can harm the environment.
• Thermostat breakdowns-- Sometimes the offender isn't the system but the brain behind it, misreading temperatures and sending out combined signals.
• Frozen coils-- Frequently an outcome of bad airflow or low refrigerant, these icy transgressors stop cooling entirely.

Specialist Tips to Keep Your System in Peak Forming

1. Change filters every 1-3 months; it's the easiest act with the most significant reward.
2. Examine condensate drains pipes for blockages to avoid water damage and mold accumulation.
3. Seal duct leakages to enhance efficiency-- in some cases a few inches of tape conserve you hundreds.

Have you ever observed your system biking on and off like an anxious heart beat? That brief biking is a red flag that Bold City Heating and Air immediately acknowledges. Bold City Heating and Air. They dive deep, detecting with precision, guaranteeing your heating and cooling does not simply limp along however grows. Their method changes stress and anxiety into relief, turning technical headaches into cool comfort

Picking a Reputable Heating And Cooling Repair Work Technician

When your air conditioning unit sputters out in the peak of summertime, or your heating unit declines to warm a chilly night, you don't just desire any specialist-- you want somebody who comprehends the heartbeat of your home's HVAC system. Not every service technician has the knack for diagnosing the tricky culprits behind inefficient cooling or heating. Picture calling somebody who covers the problem momentarily, just to have the system fail once again days later. Discouraging, right?

Bold City Heating and Air knows that reliability isn't simply about revealing up; it has to do with showing up prepared. Their service technicians arrive equipped with diagnostic tools that dive much deeper than surface signs, catching the true essence of the breakdown. They don't simply change parts; they decipher the story your system is informing. Have you ever questioned why your energy bills spike inexplicably? In some cases, it's a subtle refrigerant leak or a clogged up filter that's easy to overlook but pricey if ignored.

Specialist Tips for Spotting an Experienced HVAC Specialist

• Certification and Licensing: Validate credentials-- trained pros back their work with acknowledged certifications.
• Transparent Quotes: Search for clear explanations, not unclear quotes that dodge the information.
• Diagnostic Method: Experts use methodical checks-- no uncertainty, simply exact analytical.
• Communication Skills: Can they describe repair work without jargon? That's a sign they respect your understanding.
• Parts Quality Awareness: They ought to prioritize resilient elements, not fast repairs that fade quick.

Bold City Heating and Air prospers on an approach that a/c repair work is less about quick repairs and more about long-lived solutions crafted with care. They welcome the complexity of each system, turning what might appear like a difficult repair work into a smooth, transparent procedure. Like a skilled investigator, they unwind the quirks of your unit, guaranteeing that your convenience isn't just restored, but enhanced.

Decoding the Expenses Behind A/c Repair Work Solutions

Ever noticed how a simple HVAC repair work can in some cases spiral into a wallet-busting experience? The truth lies in the labyrinth of hidden factors that influence repair work costs. From the level of the damage to the age of your system, these aspects weave a complex story.

Picture a chilly night where your a/c unit sputters and fails. You require HVAC repair near me, and suddenly, you're faced with a quote that feels like a cryptic puzzle (Bold City Heating and Air). Just what drives these numbers?

Key Elements Influencing Repair Work Costs

• Seriousness of the Concern: Minor glitches like thermostat malfunctions cost less compared to compressor or coil replacements.
• Devices Age: Older systems typically need more comprehensive repair work or part replacements, which treks the cost.
• Labor Complexity: Difficult-to-access systems demand more time and expertise, naturally increasing labor expenses.
• Replacement Parts: Genuine parts versus generic ones, availability, and shipping can swing expenditures extensively.
• Emergency situation Service: Repairs done outside regular hours generally come with premium charges.

Bold City Heating and Air knows these complexities like the back of their hand. They've seen direct how a cracked blower wheel or a clogged up condensate drain can turn into an expensive ordeal if neglected. Their service technicians don't just patch up-- they detect with precision, guaranteeing you pay for what's required, not a cent more.

Here's a professional pointer: regular evaluation of your HVAC system's filters and condensate lines can prevent small concerns from snowballing. Did you know a clogged up filter can require your unit to work overtime, causing wear that requires expensive repair work?

Does your HVAC repair price quote seem like a shot in the dark? Bold City Heating and Air's openness and competence illuminate the procedure, guiding you through what each expense means. Comprehending these aspects can turn a demanding repair into a manageable financial investment in your home's convenience.

Trustworthy Air Conditioning Service in Jacksonville, FL

Jacksonville, FL is a lively city understood for its comprehensive park system, stunning beaches, and dynamic riverfront. As the most populated city in Florida, it uses a varied economy with strong sectors in finance, logistics, and health care. The city's warm environment makes efficient and trustworthy heating and cooling systems important for locals and organizations alike to stay comfy year-round.

For those looking for professional advice and expert heating and cooling repair near me, Bold City Heating and Air can offer a free consultation to assist deal with any cooling or heating concerns efficiently. They are ready to help with all your heating and cooling requires.

• Cummer Museum of Art and Gardens: The Cummer Museum of Art and Gardens exhibits a wide collection of art encompassing multiple eras and cultures. Guests can also explore stunning formal gardens that look out over the St. Johns River in Jacksonville FL.
• Jacksonville Zoo and Gardens: Jacksonville Zoo and Gardens displays a wide collection of animals and plants from around the world. It offers engaging displays, educational programs, and conservation efforts for visitors of all ages. Jacksonville FL
• Museum of Science and History: This Museum of Science & History in Jacksonville FL features hands-on exhibits and a planetarium appropriate for all ages. Guests can discover science, history, and culture through engaging displays and informative programs.
• Kingsley Plantation: Kingsley Plantation is a historical site that provides a peek into Florida's plantation history, including the lives of enslaved people and the planter family. Visitors can explore the grounds, including the slave quarters, plantation house, and barn. Jacksonville FL
• Fort Caroline National Memorial: Fort Caroline National Memorial honors the 16th-century French try to create a colony in Florida. It offers displays and trails exploring the history and natural environment of the area in Jacksonville FL.
• Timucuan Ecological and Historic Preserve: Timucuan Ecological and Historic Preserve safeguards one of the remaining pristine coastal wetlands on the Atlantic Coast. It maintains the history of the Timucuan Indians, European explorers, and plantation owners.
• Friendship Fountain: Friendship Fountain is a huge, well-known water fountain in Jacksonville FL. It displays striking water displays and lights, making it a favorite site and place to gather.
• Riverside Arts Market: Riverside Arts Market in Jacksonville FL, is a lively weekly arts and crafts marketplace beneath the Fuller Warren Bridge. It showcases local artisans, on-stage music, food vendors, and a beautiful view of the St. Johns River.
• San Marco Square: San Marco Square is a charming shopping and eating area with a European-style atmosphere. It is famous for its high-end shops, eateries, and the well-known fountain with lions. Jacksonville FL
• St Johns Town Center: St. Johns Town Center is an exclusive open-air retail center in Jacksonville FL, offering a blend of high-end retailers, well-known brands, and restaurants. It's a leading destination for purchasing, dining, and entertainment in North East Florida.
• Avondale Historic District: Avondale Historic District showcases appealing early 20th-century architecture and specialty shops. It's a dynamic neighborhood known for its local restaurants and historical character. Jacksonville FL
• Treaty Oak Park: Treaty Oak Park is a gorgeous area in Jacksonville FL, home to a massive, centuries-old oak tree. The park offers a calm escape with walking paths and breathtaking views of the St. Johns River.
• Little Talbot Island State Park: Little Talbot Island State Park in Jacksonville FL provides pristine beaches and varied ecosystems. Visitors can enjoy things to do such as hiking, camping, and observing wildlife in this natural shoreline setting.
• Big Talbot Island State Park: Big Talbot Island State Park in Jacksonville FL, offers stunning coastal views and diverse habitats for nature enthusiasts. Explore the one-of-a-kind boneyard beach, hike scenic trails, and observe plentiful wildlife in this lovely natural sanctuary.
• Kathryn Abbey Hanna Park: Kathryn Abbey Hanna Park in Jacksonville FL, provides a beautiful beach, forested paths, and a 60-acre freshwater lake for leisure. It is a popular place for camping, surfing, kayaking, and biking.
• Jacksonville Arboretum and Gardens: Jacksonville Arboretum and Gardens offers a beautiful natural getaway with diverse trails and themed gardens. Visitors can discover a range of plant species and savor tranquil outside recreation.
• Memorial Park: Memorial Park is a 5.25-acre area that acts as a homage to the over 1,200 Floridians who gave their lives in World War I. The park features a statue, pool, and gardens, offering a place for memory and thought. Jacksonville FL
• Hemming Park: Hemming Park is Jacksonville FL's most ancient park, a historic open square holding events, markets, and community gatherings. It offers a green space in the center of downtown with art exhibits and a vibrant atmosphere.
• Metropolitan Park: Metropolitan Park in Jacksonville FL offers a beautiful riverfront setting for events and leisure. With play areas, a concert venue, and scenic vistas, it's a well-known destination for residents and visitors as well.
• Confederate Park: Confederate Park in Jacksonville FL, was initially designated to pay tribute to Confederate soldiers and sailors. It has since been redesignated and re-purposed as a place for community events and recreation.
• Beaches Museum and History Park: Beaches Museum and History Park preserves and relays the distinct history of Jacksonville's beaches. Discover exhibits on community life-saving, surfing, and early beach communities.
• Atlantic Beach: The city of Atlantic Beach features a delightful seaside town with stunning beaches and a calm atmosphere. People can enjoy surfing, swimming, and exploring local shops and restaurants near Jacksonville FL.
• Neptune Beach: Neptune Beach offers a typical Florida beach town experience with its sandy shores and easygoing vibe. Guests can experience surfing, swimming, and exploring nearby shops and restaurants in Jacksonville FL.
• Jacksonville Beach: Jacksonville Beach is a lively coastal city famous because of its sandy shores and surf scene. It provides a mix of leisure activities, dining, and nightlife along the Atlantic Ocean.
• Huguenot Memorial Park: This park provides a lovely beachfront spot with options for camping, fishing, and birdwatching. Visitors can enjoy the natural beauty of the region with its diverse wildlife and scenic coastal views in Jacksonville FL.
• Castaway Island Preserve: Castaway Island Preserve in Jacksonville FL, offers scenic paths and boardwalks through varied ecosystems. Visitors can enjoy walks in nature, bird watching, and discovering the beauty of the shoreline area.
• Yellow Bluff Fort Historic State Park: Yellow Bluff Fort Historic State Park in Jacksonville FL protects the earthen remains of a Civil War Confederate fort. Guests can discover the historical site and discover about its significance through informative displays.
• Mandarin Museum & Historical Society: The Mandarin Museum & Historical Society safeguards the history of the Mandarin neighborhood within Jacksonville FL. Visitors can view exhibits and relics that display the area's special past.
• Museum of Southern History: This Museum of Southern History displays relics and exhibits related to the history and culture of the Southern United States. Visitors are able to explore a range of topics, including the Civil War, slavery, and Southern art and literature. Jacksonville FL
• The Catty Shack Ranch Wildlife Sanctuary: The Catty Shack Ranch Wildlife Sanctuary in Jacksonville FL, provides guided walking tours to see rescued big cats and other exotic animals. It's a non-profit organization dedicated to providing a secure, caring, forever home for these animals.

1. Air Conditioning Installation: Proper installation of cooling systems guarantees good and comfortable indoor climates. This important process assures optimal performance and longevity of climate control units.
2. Air Conditioner: ACs chill indoor spaces by removing heat and humidity. Proper installation by qualified technicians guarantees efficient performance and ideal climate control.
3. Hvac: Hvac systems govern temperature and air's condition. They are crucial for setting up environmental control answers in buildings.
4. Thermostat: A Thermostat is the primary component for regulating temperature in HVAC systems. It signals the cooling unit to activate and deactivate, keeping the preferred indoor environment.
5. Refrigerant: Refrigerant is crucial for temperature control systems, absorbing heat to produce cold air. Correct management of refrigerants is critical during HVAC installation for efficient and secure operation.
6. Compressor: The Compressor is the component of the cooling system, pumping refrigerant. This process is key for efficient temperature control in climate control systems.
7. Evaporator Coil: An Evaporator Coil absorbs heat from indoor air, cooling it down. This part is essential for efficient climate control system installation in buildings.
8. Condenser Coil: The Condenser Coil is an important component in refrigeration systems, dissipating heat outside. It promotes the heat exchange needed for effective indoor climate management.
9. Ductwork: Ductwork is vital for dispersing treated air around a building. Proper duct planning and installation are essential for successful climate regulation system positioning.
10. Ventilation: Efficient Ventilation is essential for adequate air flow and indoor air standard. It plays a critical role in guaranteeing optimal operation and effectiveness of climate control equipment.
11. Heat Pump: Heat Pumps move heat, offering both heating and cooling. They are essential components in contemporary climate control system installations, offering energy-efficient temperature regulation.
12. Split System: Split systems offer both heating and cooling through an indoor unit connected to an outdoor compressor. They provide a ductless answer for temperature regulation in certain rooms or areas.
13. Central Air Conditioning: Central air conditioning systems cool whole homes from a sole, powerful unit. Proper setup of these systems is essential for streamlined and functional home cooling.
14. Energy Efficiency Ratio: Energy Efficiency Ratio measures cooling efficiency: higher Energy Efficiency Ratio indicates better performance and reduced energy consumption for climate control systems. Selecting a unit with a high Energy Efficiency Ratio can substantially lower long-term costs when setting up a new climate control system.
15. Variable Speed Compressor: Variable Speed Compressors change refrigeration output to meet demand, enhancing performance and comfort in climate control systems. This accurate adjustment reduces energy waste and preserves stable temperatures in indoor environments.
16. Compressor Maintenance: Maintaining compressors ensures effective operation and longevity in refrigeration systems. Neglecting it can lead to costly repairs or system breakdowns when setting up climate control.
17. Air Filter: Air Filter capture dirt and debris, making sure of clean airflow within HVAC systems. This enhances system performance and indoor air condition throughout climate control setup.
18. Installation Manual: An Installation Manual gives crucial guidance for correctly installing a cooling system. It guarantees correct procedures are followed for optimal performance and safety during the unit's setup.
19. Electrical Wiring: Electrical Wiring is vital for powering and regulating the components of climate control systems. Suitable wiring ensures safe and effective operation of the cooling and heating units.
20. Indoor Unit: Indoor Unit circulates treated air inside a room. It's a vital component for climate control systems, making sure of suitable temperature management in buildings.
21. Outdoor Unit: The Outdoor Unit contains the compressor and condenser, releasing heat externally. It's crucial for a full climate control system installation, ensuring efficient cooling inside.
22. Maintenance: Routine upkeep ensures efficient operation and extends the lifespan of climate control systems. Proper Maintenance averts breakdowns and improves the efficiency of installed cooling setups.
23. Energy Efficiency: Energy Efficiency is vital for reducing energy use and costs when setting up new climate control systems. Prioritizing effective equipment and correct installation minimizes environmental effect and increases long-term savings.
24. Thermodynamics: Thermo explains how heat transfers and transforms energy, vital for cooling system system. Efficient climate control creation relies on thermodynamic principles to maximize energy use during system location.
25. Building Codes: Construction regulations guarantee correct and secure HVAC system installation in buildings. They control aspects such as energy efficiency and air flow for climate control systems.
26. Load Calculation: Load calculations establishes the warming and chilling needs of a space. This is vital for selecting suitably sized HVAC equipment for optimal climate control.
27. Mini Split: Mini Splits provide a ductless approach to climate control, offering focused heating and cooling. The ease of placement renders them suitable for spaces where adding ductwork for climate modification is unfeasible.
28. Air Handler: An Air Handler circulates conditioned air throughout a building. It's a critical component for correct climate control system setup.
29. Insulation: Insulation is crucial for keeping efficient temperature control within a building. It minimizes heat exchange, reducing the workload on air conditioning and optimizing temperature setups.
30. Drainage System: Drainage Systems eliminate moisture generated by cooling equipment. Proper drainage avoids water damage and assures effective operation of climate control setups.
31. Filter: Filters are critical components that remove pollutants from the air throughout the setup of climate control systems. This guarantees purer air circulation and safeguards the system's internal components.
32. Heating Ventilation And Air Conditioning: Heating Ventilation And Air Conditioning systems regulate inside climate by controlling temperature, humidity, and air condition. Proper setup of these systems guarantees efficient and effective cooling and climate control within buildings.
33. Split System Air Conditioner: Split system air conditioners provide efficient cooling and heating by separating the compressor and condenser from the air handler. Their design simplifies the procedure of establishing climate control in homes and businesses.
34. Hvac Technician: Hvac Technicians are skilled professionals who focus in the configuration of climate control systems. They guarantee correct operation and efficiency of these systems for ideal indoor comfort.
35. Indoor Air Quality: Indoor Air Quality greatly impacts comfort and health, so HVAC system setup should emphasize filtration and ventilation. Appropriate system planning and installation is essential for optimizing air quality.
36. Condensate Drain: This Condensate Drain removes water generated during the cooling process, stopping damage and maintaining system efficiency. Correct drain assembly is crucial for successful climate control installation and extended performance.
37. Variable Refrigerant Flow: Variable Refrigerant Flow (VRF) systems accurately regulate refrigerant amount to various zones, offering customized cooling and heating. This technology is essential for establishing effective and adaptable climate control in building setups.
38. Building Automation System: Building Automation System coordinate and optimize the functioning of HVAC equipment. This leads to improved temperature regulation and energy efficiency in buildings.
39. Air Conditioning: Heating, ventilation, and air conditioning systems adjust indoor temperature and air quality. Proper installation of these systems is crucial for efficient and effective Air Conditioning.
40. Temperature Control: Precise temperature control is essential for effective climate control system setup. It ensures peak performance and comfort in newly installed cooling systems.
41. Thermistor: Temperature-sensitive resistors are thermistors used in climate control systems to measure accurately air temperature. This data helps to regulate system performance, ensuring peak performance and energy efficiency in ecological control arrangements.
42. Thermocouple: Temperature sensors are devices essential for assuring proper HVAC system installation. They precisely measure temperature, allowing precise modifications and peak climate control function.
43. Digital Thermostat: Digital Thermostats precisely control temperature, improving HVAC system operation. They are important for establishing home climate control systems, guaranteeing efficient and pleasant environments.
44. Programmable Thermostat: Programmable Thermostats improve climate control systems by allowing customized temperature routines. This results in improved energy efficiency and comfort in residential AC setups.
45. Smart Thermostat: Clever thermostat streamline house temperature management by learning user preferences and adjusting temperatures on their own. They play a critical role in today's HVAC system setups, enhancing energy savings and comfort.
46. Bimetallic Strip: A Bimetallic Strip, composed of two metals that have different expansion rates, curves in response to temperature changes. This property is used in HVAC systems to operate thermostats and adjust heating or cooling operations.
47. Capillary Tube Thermostat: The Capillary Tube Thermostat precisely regulates temperature in cooling systems via remote sensing. This component is vital for keeping desired climate control inside buildings.
48. Thermostatic Expansion Valve: The Thermostatic Expansion Valve controls refrigerant flow into the evaporator, maintaining best cooling. This part is critical for efficient operation of refrigeration and climate control systems in buildings.
49. Setpoint: Setpoint is the desired temperature a climate control system aims to achieve. It guides the system's performance during climate management configurations to maintain preferred comfort levels.
50. Temperature Sensor: Temperature Sensors are vital for controlling warming, air flow, and cooling systems by observing air temperature and guaranteeing efficient climate control. Their data assists improve system performance during climate control setup and maintenance.
51. Feedback Loop: The Feedback Loop assists with controlling temperature throughout climate control system setup by continuously monitoring and adjusting settings. This guarantees optimal performance and energy efficiency of installed residential cooling.
52. Control System: Control Systems control temperature, moisture, and air circulation in environmental conditioning setups. These systems assure peak comfort and energy savings in temperature-controlled environments.
53. Thermal Equilibrium: Thermal Equilibrium is achieved when components reach the same temperature, essential for effective climate control system installation. Proper equilibrium guarantees maximum performance and energy conservation in set up cooling systems.
54. Thermal Conductivity: Thermal Conductivity dictates how efficiently materials move heat, affecting the cooling system configuration. Choosing materials with appropriate thermal properties assures peak performance of installed climate control systems.
55. Thermal Insulation: Thermal insulation minimizes heat flow, ensuring efficient cooling by lessening the workload on climate control systems. This enhances energy efficiency and keeps consistent temperatures in buildings.
56. On Off Control: On Off Control keeps desired temperatures by completely activating or deactivating cooling systems. This simple way is important for controlling temperature within buildings throughout environmental control system installation.
57. Pid Controller: PID controllers precisely control temperature in HVAC units. This ensures effective climate control during facility climate configuration and operation.
58. Evaporator: The Evaporator draws in heat from inside a location, chilling the air. This is a key component in climate control systems created for home comfort.
59. Condenser: This Condenser unit is a critical component in cooling equipment, dissipating heat extracted from the indoor space to the external environment. Its correct installation is crucial for effective climate control system location and performance.
60. Chlorofluorocarbon: Chlorofluorocarbons were previously widely used refrigerants which helped with refrigeration in many building systems. Their role has decreased due to environmental concerns about ozone depletion.
61. Hydrofluorocarbon: Hydrofluorocarbons are coolants frequently used in cooling systems for buildings and cars. Their suitable management is crucial during the establishment of climate control systems to avoid environmental damage and guarantee efficient operation.
62. Hydrochlorofluorocarbon: HCFCs were once regularly used coolants in air conditioning systems for buildings. Their elimination has caused the adoption of more eco-friendly alternatives for new HVAC systems.
63. Global Warming Potential: Global Warming Potential (GWP) shows how much a given mass of greenhouse gas contributes to global warming over a specified period relative to carbon dioxide. Selecting refrigerants with less GWP is key when building climate control systems to minimize environmental effects.
64. Ozone Depletion: Ozone Depletion from refrigerants poses environmental dangers. Technicians servicing cooling systems must follow regulations to prevent further harm.
65. Phase Change: Phase Change of refrigerants are crucial for effectively moving heat in climate control systems. Evaporation and condensation cycles enable cooling by absorbing heat indoors and expelling it outdoors.
66. Heat Transfer: Heat Transfer principles are crucial for effective climate control system establishment. Understanding conduction, convection, and radiation guarantees prime system functioning and energy savings during the process of installing home cooling.
67. Refrigeration Cycle: The cooling process moves heat, allowing refrigeration in climate-control systems. Correct installation and upkeep ensure efficient operation and long life of these cooling options.
68. Environmental Protection Agency: EPA controls refrigerants and sets standards for HVAC system maintenance to safeguard the ozone layer and lower greenhouse gas emissions. Technicians working with cooling equipment must be certified to ensure proper refrigerant management and prevent environmental damage.
69. Leak Detection: Leak Detection assures the integrity of refrigerant lines after climate control system installation. Spotting and addressing leaks is essential for peak performance and ecological safety of newly installed climate control systems.
70. Pressure Gauge: Pressure Gauge are essential tools for monitoring refrigerant levels during HVAC system installation. They ensure optimal performance and prevent damage by verifying pressures are within certain ranges for proper cooling operation.
71. Expansion Valve: The Expansion Valve modulates refrigerant flow in refrigeration systems, enabling efficient heat uptake. It is a key component for maximum performance in climate control setups.
72. Cooling Capacity: Cooling Capacity determines how well a system can reduce the temperature of a room. Choosing the right level is crucial for optimal performance in placement of environmental control systems.
73. Refrigerant Recovery: Refrigerant Recovery is the method of taking out and storing refrigerants during HVAC system setups. Properly recovering refrigerants stops environmental harm and ensures effective new cooling equipment installations.
74. Refrigerant Recycling: Refrigerant Recycling reclaims and reuses refrigerants, lessening environmental impact. This procedure is essential when setting up climate control systems, ensuring responsible handling and avoiding ozone depletion.
75. Safety Data Sheet: Safety Data Sheets (SDS) offer critical information on the secure handling and possible hazards of chemicals utilized in cooling system installation. Technicians use SDS data to protect themselves and avoid accidents during HVAC equipment placement and connection.
76. Synthetic Refrigerant: Synthetic Refrigerants are vital fluids used in refrigeration systems to transfer heat. Their proper management is crucial for effective climate control installation and maintenance.
77. Heat Exchange: Heat Exchange is essential for chilling buildings, allowing efficient temperature regulation. It's a key process in climate control system configuration, aiding the movement of heat to provide comfortable indoor environments.
78. Cooling Cycle: The Cooling Cycle is the fundamental process of heat removal, utilizing refrigerant to take in and give off heat. This process is vital for effective climate control system setup in buildings.
79. Scroll Compressor: Scroll compressors effectively compress refrigerant to power cooling systems. They are a critical component for effective temperature regulation in buildings.
80. Reciprocating Compressor: Reciprocating pumps are vital parts that compress refrigerant in cooling systems. They aid heat exchange, allowing effective climate control within buildings .
81. Centrifugal Compressor: Centrifugal Compressors are key parts that boost refrigerant pressure in big climate management systems. They effectively move refrigerant, enabling effective cooling and heating throughout wide areas.
82. Rotary Compressor: Rotary Compressor are a vital component in refrigeration systems, utilizing a spinning mechanism to compress refrigerant. Their effectiveness and small size render them ideal for climate control setups in different applications.
83. Compressor Motor: The Compressor Motor serves as the main force for the cooling process, circulating refrigerant. It is crucial for proper climate control system setup and operation in buildings.
84. Compressor Oil: Compressor Oil lubricates and protects mechanical parts inside a systems' compressor, ensuring effective refrigerant compression for suitable climate control. It is crucial to select the correct type of oil during system setup to ensure durability and optimal performance of the refrigeration unit.
85. Pressure Switch: The Pressure Switch observes refrigerant levels, ensuring the system works safely. It prevents damage by turning off the cooling device if pressure drops outside the acceptable range.
86. Compressor Relay: The Compressor Relay is an electrical device that controls the compressor motor in cooling setups. It guarantees the compressor begins and ceases correctly, enabling effective temperature regulation within climate control systems.
87. Suction Line: A Suction Line, a key part in cooling systems, carries refrigerant vapor from the evaporator back the compressor. Proper sizing and insulation of this line is critical for effective system performance during climate control setup.
88. Discharge Line: The discharge line transports hot, high-pressure refrigerant gas from the compressor to the condenser. Proper dimensioning and installation of the Discharge Line are essential for ideal cooling system setup.
89. Compressor Capacity: Compressor Capacity dictates the cooling power of a system for indoor temperature control. Choosing the right size ensures efficient temperature control during climate control setup.
90. Cooling Load: Cooling Load is the quantity of heat that needs to be removed from a area to keep a preferred temperature. Accurate cooling load calculation is important for appropriate HVAC system setup and sizing.
91. Air Conditioning Repair: Air Conditioning Repair ensures systems operate optimally after they are installed. It's crucial for maintaining efficient climate control systems installed.
92. Refrigerant Leak: Refrigerant Leakage reduce cooling efficiency and can result in equipment malfunction. Addressing these leaks is critical for proper climate control system configuration, guaranteeing peak performance and durability.
93. Seer Rating: SEER score indicates an HVAC system's refrigeration performance, affecting long-term energy expenses. Elevated SEER values imply increased energy savings when establishing climate control.
94. Hspf Rating: HSPF rating shows the heating efficiency of heat pumps. Higher ratings suggest better energy effectiveness during climate control configuration.
95. Preventative Maintenance: Preventative servicing guarantees HVAC systems operate effectively and reliably after setup. Consistent upkeep lessens failures and increases the lifespan of HVAC systems.
96. Airflow: Airflow guarantees efficient cooling and heating spread across a building. Proper Airflow is essential for prime operation and comfort in climate control systems.
97. Electrical Components: Electrical Components are critical for powering and controlling systems that regulate indoor temperature. They assure suitable performance, safety, and efficiency in temperature regulation systems.
98. Refrigerant Charging: Refrigerant Charging is the method of introducing the right quantity of refrigerant to a cooling system. This assures peak performance and effectiveness when setting up climate control units.
99. System Diagnosis: The System Diagnosis process pinpoints possible issues before, during, and after HVAC system setup. It ensures peak function and averts future troubles in climate control systems.
100. Hvac System: HVAC systems govern temperature, humidity, and atmosphere quality in buildings. They are vital for setting up climate control solutions in domestic and commercial areas.
101. Ductless Air Conditioning: Ductless Air Conditioning offer focused temperature control not needing broad ductwork. They make easier temperature control installation in spaces that lack existing duct systems.
102. Window Air Conditioner: Window air conditioners are standalone devices installed in windows to cool individual spaces. They offer a direct way for specific temperature regulation within a structure.
103. Portable Air Conditioner: Portable Air Conditioner units offer a versatile temperature-control solution for spaces without central systems. They can also provide temporary climate control during HVAC system configurations.
104. System Inspection: System check ensures correct installation of cooling systems by verifying component integrity and adherence to installation standards. This procedure guarantees efficient operation and avoids future malfunctions in climate control systems.
105. Coil Cleaning: Cleaning coils ensures effective heat transfer, vital for peak system performance. This maintenance process is vital for proper setup of climate control systems.
106. Refrigerant Recharge: Refrigerant Recharge is critical for reinstating cooling ability in air conditioning units. It assures peak performance and lifespan of recently installed climate control equipment.
107. Capacitor: Capacitors provide the necessary energy boost to begin and run motors inside of climate control systems. Their proper function ensures effective and reliable operation of the cooling unit.
108. Contactor: A Contactor serves as an electrical switch that controls power for the outdoor unit's components. It enables the cooling system to activate when needed.
109. Blower Motor: The Blower Motor moves air through the ductwork, enabling efficient heating and cooling distribution within a building. It's a key component for indoor climate control systems, guaranteeing stable temperature and airflow.
110. Overheating: Overheating can severely hamper the functionality of newly set-up climate control systems. Technicians must resolve this issue to guarantee efficient and dependable cooling operation.
111. Troubleshooting: Fixing identifies and resolves issues that occur during climate control system setup. Sound fixing guarantees optimal system performance and stops later issues during building cooling appliance installation.
112. Refrigerant Reclaiming: Refrigerant Reclaiming retrieves and recycles spent refrigerants. This procedure is essential for environmentally responsible climate control system installation.
113. Global Warming: Global Warming increases the demand or for cooling systems, requiring demanding more frequent setups installations. This heightened increased need drives fuels innovation in energy-efficient power-saving climate control solutions options.
114. Montreal Protocol: The Montreal Protocol phases out ozone-depleting substances utilized in cooling systems. This change requires using alternative refrigerants in new environmental control setups.
115. Greenhouse Gas: Greenhouse gases trap warmth, impacting the energy efficiency and environmental footprint of weather control system configurations. Choosing refrigerants with reduced global warming potential is vital for sustainable climate control execution.
116. Cfc: CFCs were once critical refrigerants in cooling systems for structures and vehicles. Their use has been discontinued due to their detrimental impact on the ozone layer.
117. Hcfc: Hcfc were previously common refrigerants used in cooling systems for buildings and vehicles. They facilitated the process of setting up climate control systems, but are now being discontinued due to their ozone-depleting properties.
118. Hfc: HFCs are frequently used refrigerants in cooling systems for buildings. Their proper handling is crucial during the setup of these systems to reduce environmental impact.
119. Refrigerant Oil: Cooling lubricant oils the compressor in refrigeration units, assuring seamless operation and longevity. It's essential for the correct function of cooling setups.
120. Phase-Out: Phase-out is related to the progressive reduction of certain refrigerants with high global warming capacity. This affects the choice and servicing of climate control systems in buildings.
121. Gwp: GWP indicates a refrigerant's ability to warm the planet if released. Lower GWP refrigerants are increasingly favored in climate-friendly HVAC system setups.
122. Odp: Odp refrigerants damage the ozone layer, impacting regulations for refrigeration system setup. Installers must utilize ozone-friendly alternatives during HVAC equipment placement.
123. Ashrae: ASHRAE establishes criteria and recommendations for HVAC system setup. These standards ensure effective and safe climate control system deployment in structures.
124. Hvac Systems: Hvac Systems provide temperature and air condition regulation for indoor settings. They are critical for establishing cooling setups in buildings.
125. Refrigerant Leaks: Refrigerant Leaks lower cooling system effectiveness and may harm the environment. Correct procedures throughout climate control unit installation are essential to avoid these leaks and guarantee peak performance.
126. Hvac Repair Costs: Hvac Repair Costs can significantly influence choices about switching to a new climate control system. Unexpected repair bills may encourage homeowners to put money in a full home comfort system for future savings.
127. Hvac Installation: Hvac Installation includes setting up warming, air flow, and cooling systems. It's essential for allowing effective climate control within buildings.
128. Hvac Maintenance: Hvac Maintenance guarantees effective operation and extends system life. Proper maintenance is crucial for seamless climate control system setups.
129. Hvac Troubleshooting: Hvac Troubleshooting pinpoints and resolves issues in heating, ventilation, and cooling systems. It ensures optimal operation during climate control unit setup and running.
130. Zoning Systems: Zoning schemes separate a building into separate areas for personalized temperature control. This strategy enhances well-being and energy savings during HVAC setup.
131. Compressor Types: Different Compressor Types are critical parts for efficient climate control systems. Their selection greatly impacts system effectiveness and performance in environmental comfort uses.
132. Compressor Efficiency: Compressor Efficiency is vital, dictating how effectively the system cools a space for a given energy input. Optimizing this efficiency directly impacts cooling system installation costs and long-term operational expenses.
133. Compressor Overheating: Overheating Compressor can severely harm the unit's core, resulting in system malfunction. Proper setup ensures sufficient airflow and refrigerant levels, preventing this problem in climate control system installations.
134. Compressor Failure: Compressor Failure halts the cooling process, requiring expert service during climate control system installations. A defective compressor jeopardizes the entire system's performance and lifespan when incorporating it into a building.
135. Overload Protector: An Overload Protector safeguards the compressor motor from getting too hot during climate control system setup. It prevents damage by automatically shutting off power when excessive current or temperature is detected.
136. Fan Motor: Fan Motor move air across evaporator and condenser coils, a vital process for efficient climate control system setup. They facilitate heat transfer, guaranteeing peak cooling and heating operation within the designated space.
137. Refrigerant Lines: Refrigerant Lines are crucial components that join the indoor and outdoor units, moving refrigerant to facilitate cooling. Their correct installation is key for streamlined and effective climate control system installation.
138. Condensing Unit: A Condensing Unit is the outdoor part in a cooling system. It rejects heat from the refrigerant, allowing indoor temperature control.
139. Heat Rejection: Heat Rejection is vital for cooling systems to effectively remove excess heat from a cooled area. Appropriate Heat Rejection ensures efficient performance and lifespan of climate control systems.
140. System Efficiency: System Efficiency is vital for minimizing energy use and operational costs. Optimizing efficiency during climate control setup ensures long-term savings and environmental benefits.
141. Pressure Drop: Pressure Drop is the decrease in fluid pressure as it flows through a setup, affecting airflow in environmental control setups. Properly controlling pressure decrease is essential for optimal performance and effectiveness in environmental comfort systems.
142. Subcooling: Subcooling process ensures optimal equipment performance by chilling the refrigerant under its condensing temperature. This action avoids flash gas, increasing cooling power and efficiency throughout HVAC system installation.
143. Superheat: Superheat makes sure that only vapor refrigerant enters the compressor, which prevents damage. It's important to determine superheat during HVAC system setup to optimize cooling performance and efficiency.
144. Refrigerant Charge: Refrigerant Charge is the amount of refrigerant in a system, essential for best cooling operation. Proper charging assures effective heat transfer and avoids damage during climate control installation.
145. Corrosion: Corrosion worsens metallic parts, likely leading to leaks and system malfunctions. Guarding against Corrosion is essential for maintaining the effectiveness and lifespan of climate control arrangements.
146. Fins: Blades augment the area of coils, boosting heat transfer effectiveness. This is crucial for best performance in HVAC system installations.
147. Copper Tubing: Copper piping is vital for refrigerant movement in air conditioning systems because of its durability and efficient heat transfer. Its trustworthy connections assure suitable system performance during installation of temperature regulation units.
148. Aluminum Tubing: Aluminum piping is crucial for conveying refrigerant in HVAC systems. Its light and rustproof properties make it perfect for connecting internal and external units in HVAC installations.
149. Repair Costs: Unforeseen maintenance can significantly affect the overall expense of setting up a new climate control system. Budgeting for potential Repair Costs ensures a more accurate and comprehensive cost assessment when implementing such a system.

Bold City Heating & Air

4.9(1,687)

Air conditioning repair service·

Overview

Reviews

About

Directions

Save

Nearby

Send to phone

Share

Book online

8400 Baymeadows Way Suite 1, Jacksonville, FL 32256, United States

Open 24 hours

boldcityac.com

boldcityac.com

+1 904-379-1648

6C9C+2H Baymeadows Center, Jacksonville, FL, USA

Identifies as veteran-owned

Your Maps activity

Add a label

Suggest an edit

From the owner

That Florida sun? It doesn’t play. Prepping your HVAC system now means cool breezes later. Clean filters ✔️ Check refrigerant ✔️ Program thermostats ✔️ 🔥 Be heatwave-ready with Bold City Heating & Air! Book your seasonal check-up and beat the summer rush!

3 days ago

Updates from customers

Randolph and the crew were so nice and they did a AWESOME Job of putting in new ductwork & installation. Great group of guys. RT would answer any questions you had. Felt comfortable with them in my home. From the girl at the front desk to everyone involved Thank You!! I Appreciate you all. I definitely would recommend this company to anyone 😊

a year ago

Popular times

Mondays

6a

9a

12p

3p

6p

9p

12a

3a

Photos & videos

All

Latest11 days ago

Videos

Inside

By owner

Street View & 360°

Add photos & videos

Questions and answers

Why would an AC heater not be turning on?

An AC heater may not turn on due to power issues like tripped circuit breakers, blown fuses, or loose wiring, thermostat problems such as dead batteries, incorrect settings, or a faulty unit, or safety features engaging due to clogged filte …

6 months ago

More questions

Ask the community

Review summary

4.9

1,687 reviews

"Best price and service I have ever had with an HVAC partner"

"Excellent workmanship, knowledgeable, friendly staff from owner to employees."

"They’ve been charging the service contract now the unit does not work."

Write a review

Reviews

Sort

All

company233

job98

call55

ducts51

+6

Abe Fernandez

11 reviews · 11 photos

a week ago

New

DO NOT HIRE THIS COMPANY. TOOK THEM TO COURT AND WON!

We hired Bold City Heating and Air to replace all our air ducts, and the work they performed was shockingly defective. After the job was done we noticed that … More

+4

Like

Share

Kenneth Jefferson

5 reviews · 3 photos

2 months ago

Jacob; Ben & Josie were very professional and efficient. If I could give 10 stars I would. Very knowledgeable and they kept me informed throughout the whole process of my complete AC installation. The entire process was easy with Bold City … More

Like

Share

Response from the owner 2 months ago

Thank you so much for your fantastic 5-star review, Kenneth & Monique! We're thrilled to hear that Jacob, Ben, and Josie provided you with professional and efficient service during your complete AC installation. At Bold City Heating & Air, … More

WILLIAM MOSIER

2 reviews · 4 photos

a month ago

Crew showed up on time got done earlier than expected. Everything was clean. They were quiet. I was able to work throughout the day while they were installing. Couldn’t have been more perfect. Happy with the service.

Like

Share

Response from the owner a month ago

Thank you so much for your fantastic 5-star review, William! We're thrilled to hear that our team at Bold City Heating & Air made the installation process seamless and respectful of your work day. We appreciate your support and are glad you’re happy with our service! Let us know if you need anything else in the future!

More reviews (1,684)

People also search for

Air McCall

4.9(1,471)

HVAC contractor

Indoor Quality Heating & Air

4.7(43)

HVAC contractor

Ball Air Conditioning, Inc.

4.6(62)

Air conditioning contractor

Hammond Heating & Air Conditioning

4.9(1,098)

HVAC contractor

Florida Home Air Conditioning

4.3(2,883)

Air conditioning repair service

Web results

About this data

Bold City Heating & Air

HVAC & Air Conditioning Repair in Jacksonville, FL

Bold City offers premium HVAC service and competitive pricing to the Jacksonville, Jacksonville Beaches and Ponte Vedra areas.

24/7 Fast and Reliable. Jacksonville Grown. Family Owned & Operated.

Schedule Now

Summer HVAC Tune Up for Just $89

Get your system ready for the heat!

We’ll inspect, clean, and fine tune your HVAC to boost efficiency, prevent breakdowns, and keep you cool all season long.

View Coupon

Jacksonville’s Best HVAC Company

---

At Bold City Heating & Air, we offer our customers exceptional service when it comes to HVAC in Jacksonville, FL.

From heating and cooling repairs to energy-efficient HVAC installations that save you money, we do it all. When we opened our family-owned business in 2016, we knew we wanted to be the best around and that’s a passion that still stands.

From the moment you call us to the moment we carry out our work, you can depend on us. We believe in clear upfront pricing, no hidden costs, and the highest level of workmanship. With our NATE-certified technicians and Energy Star systems we give you the perfect combination of choice, value, and customer care.
“Experience the Bold Difference” that is Bold City Heating & Air by calling us today!

We Believe In:

Clear Upfront Pricing

No Hidden Costs

High-Level Workmanship

Trusted Heating and Air Pros in Jacksonville

---

When it comes to heating and air services in Jacksonville, we offer all the services you need under one roof. But that’s not where our story ends.

From your HVAC system to your ducts and indoor air quality we offer a complete end-to-end solution. Our team is at the heart of everything we do. Our continuous program of education and training ensures our technicians are the best they can be. It also means our entire team stays up to date with the latest systems and technology. From our Energy Star systems to our whole-house approach, you can depend on every service and product we have to offer.

Our educated and experienced HVAC technicians specialize in a broad range of air conditioning, heating & indoor air quality solutions. We are dedicated to finding the right fit for your home or business. Our broad range of expertise ensures a solution to every challenge.

Satisfaction Guaranteed

Prioritizing satisfaction, Bold City Heating & Air exemplifies customer service.

Our Team Will:

• Keep Your Informed
• Target Your Goals

• Provide Honest Answers

Services

Cooling

Heating

Duct Cleaning

Maintenance

New System Installation

Number One For Heating & Cooling

---

Keeping you comfortable is our top priority!

When you need an HVAC contractor backed by generations of experience and who truly cares about your satisfaction, turn to Bold City Heating & Air. From air conditioning repairs to the installation of a new energy-efficient heating system, you can depend on our team. We’ll get to you as quickly as we can to solve any problem you might be experiencing.

If you need help with HVAC installation or replacement, we’ll recommend the perfect system and provide you with a competitive quote. We’ll help you to save money on your energy costs going forward and can even help with financing on approved credit.

Jacksonville Grown. Family Owned & Operated.

See What Our Customers Are Saying About Us!

---

Previous

Recently moved here from MD and was not familiar with the heating/AC unit. Bold City, especially Sam Powel, has been VERY helpful. In our short time here in FL, we have recommended Bold City to acquaintances numerous times, and will continue to do so.

Paul G.

Another excellent job by Bold City. Bryan was on time, thorough, explained his analysis and solution, and completed the job. He demonstrated knowledge and expertise while providing a high level of customer service. Well done!!

John L.

Recently moved here from MD and was not familiar with the heating/AC unit. Bold City, especially Sam Powel, has been VERY helpful. In our short time here in FL, we have recommended Bold City to acquaintances numerous times, and will continue to do so.

Paul G.

Another excellent job by Bold City. Bryan was on time, thorough, explained his analysis and solution, and completed the job. He demonstrated knowledge and expertise while providing a high level of customer service. Well done!!

John L.

Recently moved here from MD and was not familiar with the heating/AC unit. Bold City, especially Sam Powel, has been VERY helpful. In our short time here in FL, we have recommended Bold City to acquaintances numerous times, and will continue to do so.

Paul G.

An HVAC Team You Can Trust

---

When you’re looking for an HVAC company that you can count on, look no further than Bold City Heating & Air.

Why not try out our award-winning service for yourself? We promise to never give you the upsell. Our technicians don’t get paid commission and we don’t focus on profit margins. We know that if we give our customers the best service, our profits will look after themselves. Whether you’re looking for heating and cooling repairs in Jacksonville or you need HVAC installation or maintenance, speak to our friendly family-owned team.

We’re proud to offer our high quality HVAC services to the residents of Jacksonville. Contact our team at Bold City Heating & Air today and experience our great service for yourself!

Contact Your Bold City Specialist Today

---

Are You a New Customer?*YesNoAre You a New Customer?*

Inquiry About*Residential InstallationResidential RepairPreventative MaintenanceDuct CleaningBlow-in Attic InsulationService AgreementsIndoor Air QualityOtherInquiry About*

Submit

Bold City Heating & Air ✔️

🏠

Current address

8400 Baymeadows Way Suite 1,Jacksonville, FL 32256,United States

🔗

Website

https://boldcityac.com/

📞

Phone

+19043791648

✔️

Business status

Claimed

📍

Latitude/Longitude

30.217562,-81.578579

🔖

Categories

Air conditioning repair service

🌎

Place ID

ChIJNyAf-ffJ5YgRYOdPsLEKe30

📝

Knowledge Panel ID (KG ID)

/g/11g6n8dppf

➕

CID Number

9041832435159918432

🏢

Business Profile ID

1926681825581721738

Other GMB details

⭐

Review list display link

https://search.google.com/local/reviews?placeid=ChIJNyAf-ffJ5YgRYOdPsLEKe30

👍

Review request link

https://search.google.com/local/writereview?placeid=ChIJNyAf-ffJ5YgRYOdPsLEKe30

🧠

Knowledge Panel page link

https://www.google.com/search?kgmid=/g/11g6n8dppf

📘

GMB Post URL

https://www.google.com/search?kgmid=/g/11g6n8dppf&uact=5#lpstate=pid:-1

🙋

Ask question request URL

https://www.google.com/search?kgmid=/g/11g6n8dppf&uact=5#lpqa=a,,d,1

☝️

Questions and answers URL

https://www.google.com/search?kgmid=/g/11g6n8dppf&uact=5#lpqa=d,2

🛒

Products

https://www.google.com/search?kgmid=/g/11g6n8dppf#lpc=lpc

💁

Services

https://www.google.com/localservices/prolist?src=2&q=Bold%20City%20Heating%20%26%20Air%208400%20Baymeadows%20Way%20Suite%201%2CJacksonville%2C%20FL%2032256%2CUnited%20States

📇

Other GMB's at same address

https://www.google.com/maps/place/8400%20Baymeadows%20Way%20Suite%201%2CJacksonville%2C%20FL%2032256%2CUnited%20States

💻

GMB's with same website domain

https://www.google.com/search?q=%22boldcityac.com%22&tbm=lcl

⛓️

GMB link with Place ID

https://www.google.com/maps/place/?q=place_id:ChIJNyAf-ffJ5YgRYOdPsLEKe30

🏹

GMB link with CID

https://www.google.com/maps/place/?cid=9041832435159918432

External audit links

Below you will find links to external resources for additional information. These are external sites and is in no way related to GMB Everywhere.

SEO audit links

Website cache with Google

https://www.google.com/search?q=cache%3Aboldcityac.com

Website content indexed by Google

https://www.google.com/search?q=site%3Aboldcityac.com

Website content indexed by Google last week

https://www.google.com/search?q=site%3Aboldcityac.com&as_qdr=w

Website content indexed by Google last month

https://www.google.com/search?q=site%3Aboldcityac.com&as_qdr=m

Website content indexed by Google in the last 6 months

https://www.google.com/search?q=site%3Aboldcityac.com&as_qdr=m6

Analyze website traffic

https://app.neilpatel.com/en/traffic_analyzer/overview?domain=boldcityac.com

Analyze mobile friendliness

https://search.google.com/test/mobile-friendly?url=https%3A%2F%2Fboldcityac.com%2F

Website audit links

Google Page Speed score

https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Fboldcityac.com%2F

Domain name lookup

https://whois.domaintools.com/boldcityac.com

Technology used on website

https://builtwith.com/boldcityac.com

Website schema(Structured data) analyzer

https://search.google.com/test/rich-results?url=https%3A%2F%2Fboldcityac.com%2F

Website audit

https://app.neilpatel.com/en/seo_analyzer/site_audit?domain=boldcityac.com

Website history

https://web.archive.org/web/*/boldcityac.com

Air conditioning

From Wikipedia, the free encyclopedia

This article is about cooling of air. For the Curved Air album, see Air Conditioning (album). For a similar device capable of both cooling and heating, see Heat pump.

"a/c" redirects here. For the abbreviation used in banking and book-keeping, see Account (disambiguation). For other uses, see AC.

There are various types of air conditioners. Popular examples include: Window-mounted air conditioner (China, 2023); Ceiling-mounted cassette air conditioner (China, 2023); Wall-mounted air conditioner (Japan, 2020); Ceiling-mounted console (Also called ceiling suspended) air conditioner (China, 2023); and portable air conditioner (Vatican City, 2018).

Air conditioning, often abbreviated as A/C (US) or air con (UK),^[1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature and in some cases also controlling the humidity of internal air. Air conditioning can be achieved using a mechanical 'air conditioner' or through other methods, including passive cooling and ventilative cooling.^[2][3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC).^[4] Heat pumps are similar in many ways to air conditioners but use a reversing valve, allowing them to both heat and cool an enclosed space.^[5]

Air conditioners, which typically use vapor-compression refrigeration, range in size from small units used in vehicles or single rooms to massive units that can cool large buildings.^[6] Air source heat pumps, which can be used for heating as well as cooling, are becoming increasingly common in cooler climates.

Air conditioners can reduce mortality rates due to higher temperature.^[7] According to the International Energy Agency (IEA) 1.6 billion air conditioning units were used globally in 2016.^[8] The United Nations called for the technology to be made more sustainable to mitigate climate change and for the use of alternatives, like passive cooling, evaporative cooling, selective shading, windcatchers, and better thermal insulation.

History

[edit]

Air conditioning dates back to prehistory.^[9] Double-walled living quarters, with a gap between the two walls to encourage air flow, were found in the ancient city of Hamoukar, in modern Syria.^[10] Ancient Egyptian buildings also used a wide variety of passive air-conditioning techniques.^[11] These became widespread from the Iberian Peninsula through North Africa, the Middle East, and Northern India.^[12]

Passive techniques remained widespread until the 20th century when they fell out of fashion and were replaced by powered air conditioning. Using information from engineering studies of traditional buildings, passive techniques are being revived and modified for 21st-century architectural designs.^[13][12]

Air conditioners allow the building's indoor environment to remain relatively constant, largely independent of changes in external weather conditions and internal heat loads. They also enable deep plan buildings to be created and have allowed people to live comfortably in hotter parts of the world.^[14]

Development

[edit]

Preceding discoveries

[edit]

In 1558, Giambattista della Porta described a method of chilling ice to temperatures far below its freezing point by mixing it with potassium nitrate (then called "nitre") in his popular science book Natural Magic.^[15][16][17] In 1620, Cornelis Drebbel demonstrated "Turning Summer into Winter" for James I of England, chilling part of the Great Hall of Westminster Abbey with an apparatus of troughs and vats.^[18] Drebbel's contemporary Francis Bacon, like della Porta a believer in science communication, may not have been present at the demonstration, but in a book published later the same year, he described it as "experiment of artificial freezing" and said that "Nitre (or rather its spirit) is very cold, and hence nitre or salt when added to snow or ice intensifies the cold of the latter, the nitre by adding to its cold, but the salt by supplying activity to the cold of the snow."^[15]

In 1758, Benjamin Franklin and John Hadley, a chemistry professor at the University of Cambridge, conducted experiments applying the principle of evaporation as a means to cool an object rapidly. Franklin and Hadley confirmed that the evaporation of highly volatile liquids (such as alcohol and ether) could be used to drive down the temperature of an object past the freezing point of water. They experimented with the bulb of a mercury-in-glass thermometer as their object. They used a bellows to speed up the evaporation. They lowered the temperature of the thermometer bulb down to −14 °C (7 °F) while the ambient temperature was 18 °C (64 °F). Franklin noted that soon after they passed the freezing point of water 0 °C (32 °F), a thin film of ice formed on the surface of the thermometer's bulb and that the ice mass was about 6 mm (1⁄4 in) thick when they stopped the experiment upon reaching −14 °C (7 °F). Franklin concluded: "From this experiment, one may see the possibility of freezing a man to death on a warm summer's day."^[19]

The 19th century included many developments in compression technology. In 1820, English scientist and inventor Michael Faraday discovered that compressing and liquefying ammonia could chill air when the liquefied ammonia was allowed to evaporate.^[20] In 1842, Florida physician John Gorrie used compressor technology to create ice, which he used to cool air for his patients in his hospital in Apalachicola, Florida. He hoped to eventually use his ice-making machine to regulate the temperature of buildings.^[20][21] He envisioned centralized air conditioning that could cool entire cities. Gorrie was granted a patent in 1851,^[22] but following the death of his main backer, he was not able to realize his invention.^[23] In 1851, James Harrison created the first mechanical ice-making machine in Geelong, Australia, and was granted a patent for an ether vapor-compression refrigeration system in 1855 that produced three tons of ice per day.^[24] In 1860, Harrison established a second ice company. He later entered the debate over competing against the American advantage of ice-refrigerated beef sales to the United Kingdom.^[24]

First devices

[edit]

Electricity made the development of effective units possible. In 1901, American inventor Willis H. Carrier built what is considered the first modern electrical air conditioning unit.^{[25][26][27][28]} In 1902, he installed his first air-conditioning system, in the Sackett-Wilhelms Lithographing & Publishing Company in Brooklyn, New York.^[29] His invention controlled both the temperature and humidity, which helped maintain consistent paper dimensions and ink alignment at the printing plant. Later, together with six other employees, Carrier formed The Carrier Air Conditioning Company of America, a business that in 2020 employed 53,000 people and was valued at $18.6 billion.^[30][31]

In 1906, Stuart W. Cramer of Charlotte, North Carolina, was exploring ways to add moisture to the air in his textile mill. Cramer coined the term "air conditioning" in a patent claim which he filed that year, where he suggested that air conditioning was analogous to "water conditioning", then a well-known process for making textiles easier to process.^[32] He combined moisture with ventilation to "condition" and change the air in the factories; thus, controlling the humidity that is necessary in textile plants. Willis Carrier adopted the term and incorporated it into the name of his company.^[33]

Domestic air conditioning soon took off. In 1914, the first domestic air conditioning was installed in Minneapolis in the home of Charles Gilbert Gates. It is, however, possible that the considerable device (c. 2.1 m × 1.8 m × 6.1 m; 7 ft × 6 ft × 20 ft) was never used, as the house remained uninhabited^[20] (Gates had already died in October 1913.)

In 1931, H.H. Schultz and J.Q. Sherman developed what would become the most common type of individual room air conditioner: one designed to sit on a window ledge. The units went on sale in 1932 at US$10,000 to $50,000 (the equivalent of $200,000 to $1,200,000 in 2024.)^[20] A year later, the first air conditioning systems for cars were offered for sale.^[34] Chrysler Motors introduced the first practical semi-portable air conditioning unit in 1935,^[35] and Packard became the first automobile manufacturer to offer an air conditioning unit in its cars in 1939.^[36]

Further development

[edit]

Innovations in the latter half of the 20th century allowed more ubiquitous air conditioner use. In 1945, Robert Sherman of Lynn, Massachusetts, invented a portable, in-window air conditioner that cooled, heated, humidified, dehumidified, and filtered the air.^[37] The first inverter air conditioners were released in 1980–1981.^[38][39]

In 1954, Ned Cole, a 1939 architecture graduate from the University of Texas at Austin, developed the first experimental "suburb" with inbuilt air conditioning in each house. 22 homes were developed on a flat, treeless track in northwest Austin, Texas, and the community was christened the 'Austin Air-Conditioned Village.' The residents were subjected to a year-long study of the effects of air conditioning led by the nation’s premier air conditioning companies, builders, and social scientists. In addition, researchers from UT’s Health Service and Psychology Department studied the effects on the "artificially cooled humans." One of the more amusing discoveries was that each family reported being troubled with scorpions, the leading theory being that scorpions sought cool, shady places. Other reported changes in lifestyle were that mothers baked more, families ate heavier foods, and they were more apt to choose hot drinks.^[40][41]

Air conditioner adoption tends to increase above around $10,000 annual household income in warmer areas.^[42] Global GDP growth explains around 85% of increased air condition adoption by 2050, while the remaining 15% can be explained by climate change.^[42]

As of 2016 an estimated 1.6 billion air conditioning units were used worldwide, with over half of them in China and USA, and a total cooling capacity of 11,675 gigawatts.^[8][43] The International Energy Agency predicted in 2018 that the number of air conditioning units would grow to around 4 billion units by 2050 and that the total cooling capacity would grow to around 23,000 GW, with the biggest increases in India and China.^[8] Between 1995 and 2004, the proportion of urban households in China with air conditioners increased from 8% to 70%.^[44] As of 2015, nearly 100 million homes, or about 87% of US households, had air conditioning systems.^[45] In 2019, it was estimated that 90% of new single-family homes constructed in the US included air conditioning (ranging from 99% in the South to 62% in the West).^[46][47]

Operation

[edit]

Operating principles

[edit]

Main article: Vapor-compression refrigeration

Cooling in traditional air conditioner systems is accomplished using the vapor-compression cycle, which uses a refrigerant's forced circulation and phase change between gas and liquid to transfer heat.^[48][49] The vapor-compression cycle can occur within a unitary, or packaged piece of equipment; or within a chiller that is connected to terminal cooling equipment (such as a fan coil unit in an air handler) on its evaporator side and heat rejection equipment such as a cooling tower on its condenser side. An air source heat pump shares many components with an air conditioning system, but includes a reversing valve, which allows the unit to be used to heat as well as cool a space.^[50]

Air conditioning equipment will reduce the absolute humidity of the air processed by the system if the surface of the evaporator coil is significantly cooler than the dew point of the surrounding air. An air conditioner designed for an occupied space will typically achieve a 30% to 60% relative humidity in the occupied space.^[51]

Most modern air-conditioning systems feature a dehumidification cycle during which the compressor runs. At the same time, the fan is slowed to reduce the evaporator temperature and condense more water. A dehumidifier uses the same refrigeration cycle but incorporates both the evaporator and the condenser into the same air path; the air first passes over the evaporator coil, where it is cooled^[52] and dehumidified before passing over the condenser coil, where it is warmed again before it is released back into the room.^{[citation needed]}

Free cooling can sometimes be selected when the external air is cooler than the internal air. Therefore, the compressor does not need to be used, resulting in high cooling efficiencies for these times. This may also be combined with seasonal thermal energy storage.^[53]

Heating

[edit]

Main article: Heat pump

Some air conditioning systems can reverse the refrigeration cycle and act as an air source heat pump, thus heating instead of cooling the indoor environment. They are also commonly referred to as "reverse cycle air conditioners". The heat pump is significantly more energy-efficient than electric resistance heating, because it moves energy from air or groundwater to the heated space and the heat from purchased electrical energy. When the heat pump is in heating mode, the indoor evaporator coil switches roles and becomes the condenser coil, producing heat. The outdoor condenser unit also switches roles to serve as the evaporator and discharges cold air (colder than the ambient outdoor air).

Most air source heat pumps become less efficient in outdoor temperatures lower than 4 °C or 40 °F.^[54] This is partly because ice forms on the outdoor unit's heat exchanger coil, which blocks air flow over the coil. To compensate for this, the heat pump system must temporarily switch back into the regular air conditioning mode to switch the outdoor evaporator coil back to the condenser coil, to heat up and defrost. Therefore, some heat pump systems will have electric resistance heating in the indoor air path that is activated only in this mode to compensate for the temporary indoor air cooling, which would otherwise be uncomfortable in the winter.

Newer models have improved cold-weather performance, with efficient heating capacity down to −14 °F (−26 °C).^[55][54][56] However, there is always a chance that the humidity that condenses on the heat exchanger of the outdoor unit could freeze, even in models that have improved cold-weather performance, requiring a defrosting cycle to be performed.

The icing problem becomes much more severe with lower outdoor temperatures, so heat pumps are sometimes installed in tandem with a more conventional form of heating, such as an electrical heater, a natural gas, heating oil, or wood-burning fireplace or central heating, which is used instead of or in addition to the heat pump during harsher winter temperatures. In this case, the heat pump is used efficiently during milder temperatures, and the system is switched to the conventional heat source when the outdoor temperature is lower.

Performance

[edit]

Main articles: coefficient of performance, Seasonal energy efficiency ratio, and European seasonal energy efficiency ratio

The coefficient of performance (COP) of an air conditioning system is a ratio of useful heating or cooling provided to the work required.^[57][58] Higher COPs equate to lower operating costs. The COP usually exceeds 1; however, the exact value is highly dependent on operating conditions, especially absolute temperature and relative temperature between sink and system, and is often graphed or averaged against expected conditions.^[59] Air conditioner equipment power in the U.S. is often described in terms of "tons of refrigeration", with each approximately equal to the cooling power of one short ton (2,000 pounds (910 kg) of ice melting in a 24-hour period. The value is equal to 12,000 BTU_IT per hour, or 3,517 watts.^[60] Residential central air systems are usually from 1 to 5 tons (3.5 to 18 kW) in capacity.^{[citation needed]}

The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment.^[61] A similar standard is the European seasonal energy efficiency ratio (ESEER).^{[citation needed]}

Efficiency is strongly affected by the humidity of the air to be cooled. Dehumidifying the air before attempting to cool it can reduce subsequent cooling costs by as much as 90 percent. Thus, reducing dehumidifying costs can materially affect overall air conditioning costs.^[62]

Control system

[edit]

Wireless remote control

[edit]

Main articles: Remote control and Infrared blaster

A wireless remote controller

The infrared transmitting LED on the remote

The infrared receiver on the air conditioner

This type of controller uses an infrared LED to relay commands from a remote control to the air conditioner. The output of the infrared LED (like that of any infrared remote) is invisible to the human eye because its wavelength is beyond the range of visible light (940 nm). This system is commonly used on mini-split air conditioners because it is simple and portable. Some window and ducted central air conditioners uses it as well.

Wired controller

[edit]

Main article: Thermostat

Several wired controllers (Indonesia, 2024)

A wired controller, also called a "wired thermostat," is a device that controls an air conditioner by switching heating or cooling on or off. It uses different sensors to measure temperatures and actuate control operations. Mechanical thermostats commonly use bimetallic strips, converting a temperature change into mechanical displacement, to actuate control of the air conditioner. Electronic thermostats, instead, use a thermistor or other semiconductor sensor, processing temperature change as electronic signals to control the air conditioner.

These controllers are usually used in hotel rooms because they are permanently installed into a wall and hard-wired directly into the air conditioner unit, eliminating the need for batteries.

Types

[edit]

Types	Typical Capacity*	Air supply	Mounting	Typical application
Mini-split	small – large	Direct	Wall	Residential
Window	very small – small	Direct	Window	Residential
Portable	very small – small	Direct / Ducted	Floor	Residential, remote areas
Ducted (individual)	small – very large	Ducted	Ceiling	Residential, commercial
Ducted (central)	medium – very large	Ducted	Ceiling	Residential, commercial
Ceiling suspended	medium – large	Direct	Ceiling	Commercial
Cassette	medium – large	Direct / Ducted	Ceiling	Commercial
Floor standing	medium – large	Direct / Ducted	Floor	Commercial
Packaged	very large	Direct / Ducted	Floor	Commercial
Packaged RTU (Rooftop Unit)	very large	Ducted	Rooftop	Commercial

* where the typical capacity is in kilowatt as follows:

• very small: <1.5 kW
• small: 1.5–3.5 kW
• medium: 4.2–7.1 kW
• large: 7.2–14 kW
• very large: >14 kW

Mini-split and multi-split systems

[edit]

Ductless systems (often mini-split, though there are now ducted mini-split) typically supply conditioned and heated air to a single or a few rooms of a building, without ducts and in a decentralized manner.^[63] Multi-zone or multi-split systems are a common application of ductless systems and allow up to eight rooms (zones or locations) to be conditioned independently from each other, each with its indoor unit and simultaneously from a single outdoor unit.

The first mini-split system was sold in 1961 by Toshiba in Japan, and the first wall-mounted mini-split air conditioner was sold in 1968 in Japan by Mitsubishi Electric, where small home sizes motivated their development. The Mitsubishi model was the first air conditioner with a cross-flow fan.^[64][65][66] In 1969, the first mini-split air conditioner was sold in the US.^[67] Multi-zone ductless systems were invented by Daikin in 1973, and variable refrigerant flow systems (which can be thought of as larger multi-split systems) were also invented by Daikin in 1982. Both were first sold in Japan.^[68] Variable refrigerant flow systems when compared with central plant cooling from an air handler, eliminate the need for large cool air ducts, air handlers, and chillers; instead cool refrigerant is transported through much smaller pipes to the indoor units in the spaces to be conditioned, thus allowing for less space above dropped ceilings and a lower structural impact, while also allowing for more individual and independent temperature control of spaces. The outdoor and indoor units can be spread across the building.^[69] Variable refrigerant flow indoor units can also be turned off individually in unused spaces.^{[citation needed]} The lower start-up power of VRF's DC inverter compressors and their inherent DC power requirements also allow VRF solar-powered heat pumps to be run using DC-providing solar panels.

Ducted central systems

[edit]

Split-system central air conditioners consist of two heat exchangers, an outside unit (the condenser) from which heat is rejected to the environment and an internal heat exchanger (the evaporator, or Fan Coil Unit, FCU) with the piped refrigerant being circulated between the two. The FCU is then connected to the spaces to be cooled by ventilation ducts.^[70] Floor standing air conditioners are similar to this type of air conditioner but sit within spaces that need cooling.

Central plant cooling

[edit]

See also: Chiller

Large central cooling plants may use intermediate coolant such as chilled water pumped into air handlers or fan coil units near or in the spaces to be cooled which then duct or deliver cold air into the spaces to be conditioned, rather than ducting cold air directly to these spaces from the plant, which is not done due to the low density and heat capacity of air, which would require impractically large ducts. The chilled water is cooled by chillers in the plant, which uses a refrigeration cycle to cool water, often transferring its heat to the atmosphere even in liquid-cooled chillers through the use of cooling towers. Chillers may be air- or liquid-cooled.^[71][72]

Portable units

[edit]

A portable system has an indoor unit on wheels connected to an outdoor unit via flexible pipes, similar to a permanently fixed installed unit (such as a ductless split air conditioner).

Hose systems, which can be monoblock or air-to-air, are vented to the outside via air ducts. The monoblock type collects the water in a bucket or tray and stops when full. The air-to-air type re-evaporates the water, discharges it through the ducted hose, and can run continuously. Many but not all portable units draw indoor air and expel it outdoors through a single duct, negatively impacting their overall cooling efficiency.

Many portable air conditioners come with heat as well as a dehumidification function.^[73]

Window unit and packaged terminal

[edit]

Main article: Packaged terminal air conditioner

The packaged terminal air conditioner (PTAC), through-the-wall, and window air conditioners are similar. These units are installed on a window frame or on a wall opening. The unit usually has an internal partition separating its indoor and outdoor sides, which contain the unit's condenser and evaporator, respectively. PTAC systems may be adapted to provide heating in cold weather, either directly by using an electric strip, gas, or other heaters, or by reversing the refrigerant flow to heat the interior and draw heat from the exterior air, converting the air conditioner into a heat pump. They may be installed in a wall opening with the help of a special sleeve on the wall and a custom grill that is flush with the wall and window air conditioners can also be installed in a window, but without a custom grill.^[74]

Packaged air conditioner

[edit]

Packaged air conditioners (also known as self-contained units)^[75][76] are central systems that integrate into a single housing all the components of a split central system, and deliver air, possibly through ducts, to the spaces to be cooled. Depending on their construction they may be outdoors or indoors, on roofs (rooftop units),^[77][78] draw the air to be conditioned from inside or outside a building and be water or air-cooled. Often, outdoor units are air-cooled while indoor units are liquid-cooled using a cooling tower.^{[70][79][80][81][82][83]}

Types of compressors

[edit]

Compressor types	Common applications	Typical capacity	Efficiency	Durability	Repairability
Reciprocating	Refrigerator, Walk-in freezer, portable air conditioners	small – large	very low (small capacity) medium (large capacity)	very low	medium
Rotary vane	Residential mini splits	small	low	low	easy
Scroll	Commercial and central systems, VRF	medium	medium	medium	easy
Rotary screw	Commercial chiller	medium – large	medium	medium	hard
Centrifugal	Commercial chiller	very large	medium	high	hard
Maglev Centrifugal	Commercial chiller	very large	high	very high	very hard

Reciprocating

[edit]

Main article: Reciprocating compressor

This compressor consists of a crankcase, crankshaft, piston rod, piston, piston ring, cylinder head and valves. ^{[citation needed]}

Scroll

[edit]

Main article: Scroll compressor

This compressor uses two interleaving scrolls to compress the refrigerant.^[84] it consists of one fixed and one orbiting scrolls. This type of compressor is more efficient because it has 70 percent less moving parts than a reciprocating compressor. ^{[citation needed]}

Screw

[edit]

Main article: Rotary-screw compressor

This compressor use two very closely meshing spiral rotors to compress the gas. The gas enters at the suction side and moves through the threads as the screws rotate. The meshing rotors force the gas through the compressor, and the gas exits at the end of the screws. The working area is the inter-lobe volume between the male and female rotors. It is larger at the intake end, and decreases along the length of the rotors until the exhaust port. This change in volume is the compression. ^{[citation needed]}

Capacity modulation technologies

[edit]

There are several ways to modulate the cooling capacity in refrigeration or air conditioning and heating systems. The most common in air conditioning are: on-off cycling, hot gas bypass, use or not of liquid injection, manifold configurations of multiple compressors, mechanical modulation (also called digital), and inverter technology. ^{[citation needed]}

Hot gas bypass

[edit]

Hot gas bypass involves injecting a quantity of gas from discharge to the suction side. The compressor will keep operating at the same speed, but due to the bypass, the refrigerant mass flow circulating with the system is reduced, and thus the cooling capacity. This naturally causes the compressor to run uselessly during the periods when the bypass is operating. The turn down capacity varies between 0 and 100%.^[85]

Manifold configurations

[edit]

Several compressors can be installed in the system to provide the peak cooling capacity. Each compressor can run or not in order to stage the cooling capacity of the unit. The turn down capacity is either 0/33/66 or 100% for a trio configuration and either 0/50 or 100% for a tandem.^{[citation needed]}

Mechanically modulated compressor

[edit]

This internal mechanical capacity modulation is based on periodic compression process with a control valve, the two scroll set move apart stopping the compression for a given time period. This method varies refrigerant flow by changing the average time of compression, but not the actual speed of the motor. Despite an excellent turndown ratio – from 10 to 100% of the cooling capacity, mechanically modulated scrolls have high energy consumption as the motor continuously runs.^{[citation needed]}

Variable-speed compressor

[edit]

Main article: Inverter compressor

This system uses a variable-frequency drive (also called an Inverter) to control the speed of the compressor. The refrigerant flow rate is changed by the change in the speed of the compressor. The turn down ratio depends on the system configuration and manufacturer. It modulates from 15 or 25% up to 100% at full capacity with a single inverter from 12 to 100% with a hybrid tandem. This method is the most efficient way to modulate an air conditioner's capacity. It is up to 58% more efficient than a fixed speed system.^{[citation needed]}

Impact

[edit]

Health effects

[edit]

In hot weather, air conditioning can prevent heat stroke, dehydration due to excessive sweating, electrolyte imbalance, kidney failure, and other issues due to hyperthermia.^[8][86] Heat waves are the most lethal type of weather phenomenon in the United States.^[87][88] A 2020 study found that areas with lower use of air conditioning correlated with higher rates of heat-related mortality and hospitalizations.^[89] The August 2003 France heatwave resulted in approximately 15,000 deaths, where 80% of the victims were over 75 years old. In response, the French government required all retirement homes to have at least one air-conditioned room at 25 °C (77 °F) per floor during heatwaves.^[8]

Air conditioning (including filtration, humidification, cooling and disinfection) can be used to provide a clean, safe, hypoallergenic atmosphere in hospital operating rooms and other environments where proper atmosphere is critical to patient safety and well-being. It is sometimes recommended for home use by people with allergies, especially mold.^[90][91] However, poorly maintained water cooling towers can promote the growth and spread of microorganisms such as Legionella pneumophila, the infectious agent responsible for Legionnaires' disease. As long as the cooling tower is kept clean (usually by means of a chlorine treatment), these health hazards can be avoided or reduced. The state of New York has codified requirements for registration, maintenance, and testing of cooling towers to protect against Legionella.^[92]

Economic effects

[edit]

First designed to benefit targeted industries such as the press as well as large factories, the invention quickly spread to public agencies and administrations with studies with claims of increased productivity close to 24% in places equipped with air conditioning.^[93]

Air conditioning caused various shifts in demography, notably that of the United States starting from the 1970s. In the US, the birth rate was lower in the spring than during other seasons until the 1970s but this difference then declined since then.^[94] As of 2007, the Sun Belt contained 30% of the total US population while it was inhabited by 24% of Americans at the beginning of the 20th century.^[95] Moreover, the summer mortality rate in the US, which had been higher in regions subject to a heat wave during the summer, also evened out.^[7]

The spread of the use of air conditioning acts as a main driver for the growth of global demand of electricity.^[96] According to a 2018 report from the International Energy Agency (IEA), it was revealed that the energy consumption for cooling in the United States, involving 328 million Americans, surpasses the combined energy consumption of 4.4 billion people in Africa, Latin America, the Middle East, and Asia (excluding China).^[8] A 2020 survey found that an estimated 88% of all US households use AC, increasing to 93% when solely looking at homes built between 2010 and 2020.^[97]

Environmental effects

[edit]

Space cooling including air conditioning accounted globally for 2021 terawatt-hours of energy usage in 2016 with around 99% in the form of electricity, according to a 2018 report on air-conditioning efficiency by the International Energy Agency.^[8] The report predicts an increase of electricity usage due to space cooling to around 6200 TWh by 2050,^[8][98] and that with the progress currently seen, greenhouse gas emissions attributable to space cooling will double: 1,135 million tons (2016) to 2,070 million tons.^[8] There is some push to increase the energy efficiency of air conditioners. United Nations Environment Programme (UNEP) and the IEA found that if air conditioners could be twice as effective as now, 460 billion tons of GHG could be cut over 40 years.^[99] The UNEP and IEA also recommended legislation to decrease the use of hydrofluorocarbons, better building insulation, and more sustainable temperature-controlled food supply chains going forward.^[99]

Refrigerants have also caused and continue to cause serious environmental issues, including ozone depletion and climate change, as several countries have not yet ratified the Kigali Amendment to reduce the consumption and production of hydrofluorocarbons.^[100] CFCs and HCFCs refrigerants such as R-12 and R-22, respectively, used within air conditioners have caused damage to the ozone layer,^[101] and hydrofluorocarbon refrigerants such as R-410A and R-404A, which were designed to replace CFCs and HCFCs, are instead exacerbating climate change.^[102] Both issues happen due to the venting of refrigerant to the atmosphere, such as during repairs. HFO refrigerants, used in some if not most new equipment, solve both issues with an ozone damage potential (ODP) of zero and a much lower global warming potential (GWP) in the single or double digits vs. the three or four digits of hydrofluorocarbons.^[103]

Hydrofluorocarbons would have raised global temperatures by around 0.3–0.5 °C (0.5–0.9 °F) by 2100 without the Kigali Amendment. With the Kigali Amendment, the increase of global temperatures by 2100 due to hydrofluorocarbons is predicted to be around 0.06 °C (0.1 °F).^[104]

Alternatives to continual air conditioning include passive cooling, passive solar cooling, natural ventilation, operating shades to reduce solar gain, using trees, architectural shades, windows (and using window coatings) to reduce solar gain.^{[citation needed]}

Social effects

[edit]

Socioeconomic groups with a household income below around $10,000 tend to have a low air conditioning adoption,^[42] which worsens heat-related mortality.^[7] The lack of cooling can be hazardous, as areas with lower use of air conditioning correlate with higher rates of heat-related mortality and hospitalizations.^[89] Premature mortality in NYC is projected to grow between 47% and 95% in 30 years, with lower-income and vulnerable populations most at risk.^[89] Studies on the correlation between heat-related mortality and hospitalizations and living in low socioeconomic locations can be traced in Phoenix, Arizona,^[105] Hong Kong,^[106] China,^[106] Japan,^[107] and Italy.^[108][109] Additionally, costs concerning health care can act as another barrier, as the lack of private health insurance during a 2009 heat wave in Australia, was associated with heat-related hospitalization.^[109]

Disparities in socioeconomic status and access to air conditioning are connected by some to institutionalized racism, which leads to the association of specific marginalized communities with lower economic status, poorer health, residing in hotter neighborhoods, engaging in physically demanding labor, and experiencing limited access to cooling technologies such as air conditioning.^[109] A study overlooking Chicago, Illinois, Detroit, and Michigan found that black households were half as likely to have central air conditioning units when compared to their white counterparts.^[110] Especially in cities, Redlining creates heat islands, increasing temperatures in certain parts of the city.^[109] This is due to materials heat-absorbing building materials and pavements and lack of vegetation and shade coverage.^[111] There have been initiatives that provide cooling solutions to low-income communities, such as public cooling spaces.^[8][111]

Other techniques

[edit]

Buildings designed with passive air conditioning are generally less expensive to construct and maintain than buildings with conventional HVAC systems with lower energy demands.^[112] While tens of air changes per hour, and cooling of tens of degrees, can be achieved with passive methods, site-specific microclimate must be taken into account, complicating building design.^[12]

Many techniques can be used to increase comfort and reduce the temperature in buildings. These include evaporative cooling, selective shading, wind, thermal convection, and heat storage.^[113]

Passive ventilation

[edit]

This section is an excerpt from Passive ventilation.[edit]

Passive ventilation is the process of supplying air to and removing air from an indoor space without using mechanical systems. It refers to the flow of external air to an indoor space as a result of pressure differences arising from natural forces.

There are two types of natural ventilation occurring in buildings: wind driven ventilation and buoyancy-driven ventilation. Wind driven ventilation arises from the different pressures created by wind around a building or structure, and openings being formed on the perimeter which then permit flow through the building. Buoyancy-driven ventilation occurs as a result of the directional buoyancy force that results from temperature differences between the interior and exterior.^[114]

Since the internal heat gains which create temperature differences between the interior and exterior are created by natural processes, including the heat from people, and wind effects are variable, naturally ventilated buildings are sometimes called "breathing buildings".

Passive cooling

[edit]

This section is an excerpt from Passive cooling.[edit]

Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption.^[115][116] This approach works either by preventing heat from entering the interior (heat gain prevention) or by removing heat from the building (natural cooling).^[117]

Natural cooling utilizes on-site energy, available from the natural environment, combined with the architectural design of building components (e.g. building envelope), rather than mechanical systems to dissipate heat.^[118] Therefore, natural cooling depends not only on the architectural design of the building but on how the site's natural resources are used as heat sinks (i.e. everything that absorbs or dissipates heat). Examples of on-site heat sinks are the upper atmosphere (night sky), the outdoor air (wind), and the earth/soil.

Passive cooling is an important tool for design of buildings for climate change adaptation – reducing dependency on energy-intensive air conditioning in warming environments.^[119][120]

Daytime radiative cooling

[edit]

Passive daytime radiative cooling (PDRC) surfaces reflect incoming solar radiation and heat back into outer space through the infrared window for cooling during the daytime. Daytime radiative cooling became possible with the ability to suppress solar heating using photonic structures, which emerged through a study by Raman et al. (2014).^[122] PDRCs can come in a variety of forms, including paint coatings and films, that are designed to be high in solar reflectance and thermal emittance.^[121][123]

PDRC applications on building roofs and envelopes have demonstrated significant decreases in energy consumption and costs.^[123] In suburban single-family residential areas, PDRC application on roofs can potentially lower energy costs by 26% to 46%.^[124] PDRCs are predicted to show a market size of ~$27 billion for indoor space cooling by 2025 and have undergone a surge in research and development since the 2010s.^[125][126]

Fans

[edit]

Main article: Ceiling fan

Hand fans have existed since prehistory. Large human-powered fans built into buildings include the punkah.

The 2nd-century Chinese inventor Ding Huan of the Han dynasty invented a rotary fan for air conditioning, with seven wheels 3 m (10 ft) in diameter and manually powered by prisoners.^{[127]: 99, 151, 233} In 747, Emperor Xuanzong (r. 712–762) of the Tang dynasty (618–907) had the Cool Hall (Liang Dian 涼殿) built in the imperial palace, which the Tang Yulin describes as having water-powered fan wheels for air conditioning as well as rising jet streams of water from fountains. During the subsequent Song dynasty (960–1279), written sources mentioned the air conditioning rotary fan as even more widely used.^{[127]: 134, 151}

Thermal buffering

[edit]

In areas that are cold at night or in winter, heat storage is used. Heat may be stored in earth or masonry; air is drawn past the masonry to heat or cool it.^[13]

In areas that are below freezing at night in winter, snow and ice can be collected and stored in ice houses for later use in cooling.^[13] This technique is over 3,700 years old in the Middle East.^[128] Harvesting outdoor ice during winter and transporting and storing for use in summer was practiced by wealthy Europeans in the early 1600s,^[15] and became popular in Europe and the Americas towards the end of the 1600s.^[129] This practice was replaced by mechanical compression-cycle icemakers.

Evaporative cooling

[edit]

Main article: Evaporative cooler

In dry, hot climates, the evaporative cooling effect may be used by placing water at the air intake, such that the draft draws air over water and then into the house. For this reason, it is sometimes said that the fountain, in the architecture of hot, arid climates, is like the fireplace in the architecture of cold climates.^[11] Evaporative cooling also makes the air more humid, which can be beneficial in a dry desert climate.^[130]

Evaporative coolers tend to feel as if they are not working during times of high humidity, when there is not much dry air with which the coolers can work to make the air as cool as possible for dwelling occupants. Unlike other types of air conditioners, evaporative coolers rely on the outside air to be channeled through cooler pads that cool the air before it reaches the inside of a house through its air duct system; this cooled outside air must be allowed to push the warmer air within the house out through an exhaust opening such as an open door or window.^[131]

See also

[edit]

• Air filter
• Air purifier
• Cleanroom
• Crankcase heater
• Energy recovery ventilation
• Indoor air quality
• Particulates

References

[edit]

1. ^ "Air Con". Cambridge Dictionary. Archived from the original on May 3, 2022. Retrieved January 6, 2023.
2. ^ Dissertation Abstracts International: The humanities and social sciences. A. University Microfilms. 2005. p. 3600.
3. ^ 1993 ASHRAE Handbook: Fundamentals. ASHRAE. 1993. ISBN 978-0-910110-97-6.
4. ^ Enteria, Napoleon; Sawachi, Takao; Saito, Kiyoshi (January 31, 2023). Variable Refrigerant Flow Systems: Advances and Applications of VRF. Springer Nature. p. 46. ISBN 978-981-19-6833-4.
5. ^ Agencies, United States Congress House Committee on Appropriations Subcommittee on Dept of the Interior and Related (1988). Department of the Interior and Related Agencies Appropriations for 1989: Testimony of public witnesses, energy programs, Institute of Museum Services, National Endowment for the Arts, National Endowment for the Humanities. U.S. Government Printing Office. p. 629.
6. ^ "Earth Tubes: Providing the freshest possible air to your building". Earth Rangers Centre for Sustainable Technology Showcase. Archived from the original on January 28, 2021. Retrieved May 12, 2021.
7. ^ Jump up to:^{a b c} Barreca, Alan; Clay, Karen; Deschenes, Olivier; Greenstone, Michael; Shapiro, Joseph S. (February 2016). "Adapting to Climate Change: The Remarkable Decline in the US Temperature-Mortality Relationship over the Twentieth Century". Journal of Political Economy. 124 (1): 105–159. doi:10.1086/684582.
8. ^ Jump up to:^{a b c d e f g h i j} International Energy Agency (May 15, 2018). The Future of Cooling - Opportunities for energy-efficient air conditioning (PDF) (Report). Archived (PDF) from the original on June 26, 2024. Retrieved July 1, 2024.
9. ^ Laub, Julian M. (1963). Air Conditioning & Heating Practice. Holt, Rinehart and Winston. p. 367. ISBN 978-0-03-011225-6.
10. ^ "Air-conditioning found at 'oldest city in the world'". The Independent. June 24, 2000. Archived from the original on December 8, 2023. Retrieved December 9, 2023.
11. ^ Jump up to:^{a b c} Mohamed, Mady A.A. (January 2010). Lehmann, S.; Waer, H.A.; Al-Qawasmi, J. (eds.). Traditional Ways of Dealing with Climate in Egypt. The Seventh International Conference of Sustainable Architecture and Urban Development (SAUD 2010). Amman, Jordan: The Center for the Study of Architecture in Arab Region (CSAAR Press). pp. 247–266. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
12. ^ Jump up to:^{a b c} Ford, Brian (September 2001). "Passive downdraught evaporative cooling: principles and practice". Architectural Research Quarterly. 5 (3): 271–280. doi:10.1017/S1359135501001312.
13. ^ Jump up to:^{a b c} Attia, Shady; Herde, André de (June 22–24, 2009). Designing the Malqaf for Summer Cooling in Low-Rise Housing, an Experimental Study. 26th Conference on Passive and Low Energy Architecture (PLEA2009). Quebec City. Archived from the original on May 13, 2021. Retrieved May 12, 2021 – via ResearchGate.
14. ^ "Heating, Ventilation and Air-Conditioning Systems, Part of Indoor Air Quality Design Tools for Schools". US EPA. October 17, 2014. Archived from the original on July 5, 2022. Retrieved July 5, 2022.
15. ^ Jump up to:^{a b c} Shachtman, Tom (1999). "Winter in Summer". Absolute zero and the conquest of cold. Boston: Houghton Mifflin Harcourt. ISBN 978-0395938881. OCLC 421754998. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
16. ^ Porta, Giambattista Della (1584). Magiae naturalis (PDF). London. LCCN 09023451. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021. In our method I shall observe what our ancestors have said; then I shall show by my own experience, whether they be true or false
17. ^ Beck, Leonard D. (October 1974). "Things Magical in the collections of the Rare Book and Special Collections Division" (PDF). Library of Congress Quarterly Journal. 31: 208–234. Archived (PDF) from the original on March 24, 2021. Retrieved May 12, 2021.
18. ^ Laszlo, Pierre (2001). Salt: Grain of Life. Columbia University Press. p. 117. ISBN 978-0231121989. OCLC 785781471. Cornelius Drebbel air conditioning.
19. ^ Franklin, Benjamin (June 17, 1758). "The Montgomery Family: An historical and photographic perspective". Letter to John Lining. Archived from the original on February 25, 2021. Retrieved May 12, 2021.
20. ^ Jump up to:^{a b c d} Green, Amanda (January 1, 2015). "The Cool History of the Air Conditioner". Popular Mechanics. Archived from the original on April 10, 2021. Retrieved May 12, 2021.
21. ^ "John Gorrie". Encyclopædia Britannica. September 29, 2020. Archived from the original on March 13, 2021. Retrieved May 12, 2021.
22. ^ Gorrie, John "Improved process for the artificial production of ice" U.S. Patent no. 8080 (Issued: May 6, 1851).
23. ^ Wright, E. Lynne (2009). It Happened in Florida: Remarkable Events That Shaped History. Rowman & Littlefield. pp. 13–. ISBN 978-0762761692.
24. ^ Jump up to:^{a b} Bruce-Wallace, L. G. (1966). "Harrison, James (1816–1893)". Australian Dictionary of Biography. Vol. 1. Canberra: National Centre of Biography, Australian National University. ISBN 978-0-522-84459-7. ISSN 1833-7538. OCLC 70677943. Retrieved May 12, 2021.
25. ^ Palermo, Elizabeth (May 1, 2014). "Who Invented Air Conditioning?". livescience.com. Archived from the original on January 16, 2021. Retrieved May 12, 2021.
26. ^ Varrasi, John (June 6, 2011). "Global Cooling: The History of Air Conditioning". American Society of Mechanical Engineers. Archived from the original on March 8, 2021. Retrieved May 12, 2021.
27. ^ Simha, R. V. (February 2012). "Willis H Carrier". Resonance. 17 (2): 117–138. doi:10.1007/s12045-012-0014-y. ISSN 0971-8044. S2CID 116582893.
28. ^ Gulledge III, Charles; Knight, Dennis (February 11, 2016). "Heating, Ventilating, Air-Conditioning, And Refrigerating Engineering". National Institute of Building Sciences. Archived from the original on April 20, 2021. Retrieved May 12, 2021. Though he did not actually invent air-conditioning nor did he take the first documented scientific approach to applying it, Willis Carrier is credited with integrating the scientific method, engineering, and business of this developing technology and creating the industry we know today as air-conditioning.
29. ^ "Willis Carrier – 1876–1902". Carrier Global. Archived from the original on February 27, 2021. Retrieved May 12, 2021.
30. ^ "Carrier Reports First Quarter 2020 Earnings". Carrier Global (Press release). May 8, 2020. Archived from the original on January 24, 2021. Retrieved May 12, 2021.
31. ^ "Carrier Becomes Independent, Publicly Traded Company, Begins Trading on New York Stock Exchange". Carrier Global (Press release). April 3, 2020. Archived from the original on February 25, 2021. Retrieved May 12, 2021.
32. ^ Cramer, Stuart W. "Humidifying and air conditioning apparatus" U.S. Patent no. 852,823 (filed: April 18, 1906; issued: May 7, 1907).
    • See also: Cramer, Stuart W. (1906) "Recent development in air conditioning" in: Proceedings of the Tenth Annual Convention of the American Cotton Manufacturers Association Held at Asheville, North Carolina May 16–17, 1906. Charlotte, North Carolina, USA: Queen City Publishing Co. pp. 182-211.
33. ^ US patent US808897A, Carrier, Willis H., "Apparatus for treating air", published January 2, 1906, issued January 2, 1906 and Buffalo Forge Company"No. 808,897 Patented Jan. 2, 1906: H. W. Carrier: Apparatus for Treating Air" (PDF). Archived (PDF) from the original on December 5, 2019. Retrieved May 12, 2021.
34. ^ "First Air-Conditioned Auto". Popular Science. Vol. 123, no. 5. November 1933. p. 30. ISSN 0161-7370. Archived from the original on April 26, 2021. Retrieved May 12, 2021.
35. ^ "Room-size air conditioner fits under window sill". Popular Mechanics. Vol. 63, no. 6. June 1935. p. 885. ISSN 0032-4558. Archived from the original on November 22, 2016. Retrieved May 12, 2021.
36. ^ "Michigan Fast Facts and Trivia". 50states.com. Archived from the original on June 18, 2017. Retrieved May 12, 2021.
37. ^ US patent US2433960A, Sherman, Robert S., "Air conditioning apparatus", published January 6, 1948, issued January 6, 1948
38. ^ "IEEE milestones (39) Inverter Air Conditioners, 1980–1981" (PDF). March 2021. Archived (PDF) from the original on January 21, 2024. Retrieved February 9, 2024.
39. ^ "Inverter Air Conditioners, 1980–1981 IEEE Milestone Celebration Ceremony" (PDF). March 16, 2021. Archived (PDF) from the original on January 21, 2024. Retrieved February 9, 2024.
40. ^ Seale, Avrel (August 7, 2023). "Texas alumnus and his alma mater central to air-conditioned homes". UT News. Retrieved November 13, 2024.
41. ^ "Air Conditioned Village". Atlas Obscura. Retrieved November 13, 2024.
42. ^ Jump up to:^{a b c} Davis, Lucas; Gertler, Paul; Jarvis, Stephen; Wolfram, Catherine (July 2021). "Air conditioning and global inequality". Global Environmental Change. 69: 102299. Bibcode:2021GEC....6902299D. doi:10.1016/j.gloenvcha.2021.102299.
43. ^ Pierre-Louis, Kendra (May 15, 2018). "The World Wants Air-Conditioning. That Could Warm the World". The New York Times. Archived from the original on February 16, 2021. Retrieved May 12, 2021.
44. ^ Carroll, Rory (October 26, 2015). "How America became addicted to air conditioning". The Guardian. Los Angeles. Archived from the original on March 13, 2021. Retrieved May 12, 2021.
45. ^ Lester, Paul (July 20, 2015). "History of Air Conditioning". United States Department of Energy. Archived from the original on June 5, 2020. Retrieved May 12, 2021.
46. ^ Cornish, Cheryl; Cooper, Stephen; Jenkins, Salima. Characteristics of New Housing (Report). United States Census Bureau. Archived from the original on April 11, 2021. Retrieved May 12, 2021.
47. ^ "Central Air Conditioning Buying Guide". Consumer Reports. March 3, 2021. Archived from the original on May 9, 2021. Retrieved May 12, 2021.
48. ^ Petchers, Neil (2003). Combined Heating, Cooling & Power Handbook: Technologies & Applications : an Integrated Approach to Energy Resource Optimization. The Fairmont Press. p. 737. ISBN 978-0-88173-433-1.
49. ^ Krarti, Moncef (December 1, 2020). Energy Audit of Building Systems: An Engineering Approach, Third Edition. CRC Press. p. 370. ISBN 978-1-000-25967-4.
50. ^ "What is a Reversing Valve". Samsung India. Archived from the original on February 22, 2019. Retrieved May 12, 2021.
51. ^ "Humidity and Comfort" (PDF). DriSteem. Archived from the original (PDF) on May 16, 2018. Retrieved May 12, 2021.
52. ^ Perryman, Oliver (April 19, 2021). "Dehumidifier vs Air Conditioning". Dehumidifier Critic. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
53. ^ Snijders, Aart L. (July 30, 2008). "Aquifer Thermal Energy Storage (ATES) Technology Development and Major Applications in Europe" (PDF). Toronto and Region Conservation Authority. Arnhem: IFTech International. Archived (PDF) from the original on March 8, 2021. Retrieved May 12, 2021.
54. ^ Jump up to:^{a b} "Cold Climate Air Source Heat Pump" (PDF). Minnesota Department of Commerce, Division of Energy Resources. Archived (PDF) from the original on January 2, 2022. Retrieved March 29, 2022.
55. ^ "Even in Frigid Temperatures, Air-Source Heat Pumps Keep Homes Warm From Alaska Coast to U.S. Mass Market". nrel.gov. Archived from the original on April 10, 2022. Retrieved March 29, 2022.
56. ^ "Heat Pumps: A Practical Solution for Cold Climates". RMI. December 10, 2020. Archived from the original on March 31, 2022. Retrieved March 28, 2022.
57. ^ "TEM Instruction Sheet" (PDF). TE Technology. March 14, 2012. Archived from the original (PDF) on January 24, 2013. Retrieved May 12, 2021.
58. ^ "Coefficient of Performance (COP) heat pumps". Grundfos. November 18, 2020. Archived from the original on May 3, 2021. Retrieved May 12, 2021.
59. ^ "Unpotted HP-199-1.4-0.8 at a hot-side temperature of 25 °C" (PDF). TE Technology. Archived from the original (PDF) on January 7, 2009. Retrieved February 9, 2024.
60. ^ Newell, David B.; Tiesinga, Eite, eds. (August 2019). The International System of Units (SI) (PDF). National Institute of Standards and Technology. doi:10.6028/NIST.SP.330-2019. Archived (PDF) from the original on April 22, 2021. Retrieved May 13, 2021.
61. ^ ANSI/AHRI 210/240-2008: 2008 Standard for Performance Rating of Unitary Air-Conditioning & Air-Source Heat Pump Equipment (PDF). Air Conditioning, Heating and Refrigeration Institute. 2012. Archived from the original on March 29, 2018. Retrieved May 13, 2021.
62. ^ Baraniuk, Chris. "Cutting-Edge Technology Could Massively Reduce the Amount of Energy Used for Air Conditioning". Wired. ISSN 1059-1028. Retrieved July 18, 2024.
63. ^ "M-Series Contractor Guide" (PDF). Mitsubishipro.com. p. 19. Archived (PDF) from the original on March 18, 2021. Retrieved May 12, 2021.
64. ^ "エアコンの歴史とヒミツ | 調べよう家電と省エネ | キッズ版 省エネ家電 de スマートライフ（一般財団法人 家電製品協会） 学ぼう！スマートライフ". shouene-kaden.net. Archived from the original on September 7, 2022. Retrieved January 21, 2024.
65. ^ "Air conditioner | History". Toshiba Carrier. April 2016. Archived from the original on March 9, 2021. Retrieved May 12, 2021.
66. ^ "1920s–1970s | History". Mitsubishi Electric. Archived from the original on March 8, 2021. Retrieved May 12, 2021.
67. ^ Wagner, Gerry (November 30, 2021). "The Duct Free Zone: History of the Mini Split". HPAC Magazine. Retrieved February 9, 2024.
68. ^ "History of Daikin Innovation". Daikin. Archived from the original on June 5, 2020. Retrieved May 12, 2021.
69. ^ Feit, Justin (December 20, 2017). "The Emergence of VRF as a Viable HVAC Option". buildings.com. Archived from the original on December 3, 2020. Retrieved May 12, 2021.
70. ^ Jump up to:^{a b} "Central Air Conditioning". United States Department of Energy. Archived from the original on January 30, 2021. Retrieved May 12, 2021.
71. ^ Kreith, Frank; Wang, Shan K.; Norton, Paul (April 20, 2018). Air Conditioning and Refrigeration Engineering. CRC Press. ISBN 978-1-351-46783-4.
72. ^ Wang, Shan K. (November 7, 2000). Handbook of Air Conditioning and Refrigeration. McGraw-Hill Education. ISBN 978-0-07-068167-5.
73. ^ Hleborodova, Veronika (August 14, 2018). "Portable Vs Split System Air Conditioning | Pros & Cons". Canstar Blue. Archived from the original on March 9, 2021. Retrieved May 12, 2021.
74. ^ Kamins, Toni L. (July 15, 2013). "Through-the-Wall Versus PTAC Air Conditioners: A Guide for New Yorkers". Brick Underground. Archived from the original on January 15, 2021. Retrieved May 12, 2021.
75. ^ "Self-Contained Air Conditioning Systems". Daikin Applied Americas. 2015. Archived from the original on October 30, 2020. Retrieved May 12, 2021.
76. ^ "LSWU/LSWD Vertical Water-Cooled Self-Contained Unit Engineering Guide" (PDF). Johnson Controls. April 6, 2018. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
77. ^ "Packaged Rooftop Unit" (PDF). Carrier Global. 2016. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
78. ^ "Packaged Rooftop Air Conditioners" (PDF). Trane Technologies. November 2006. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
79. ^ "What is Packaged Air Conditioner? Types of Packged Air Condtioners". Bright Hub Engineering. January 13, 2010. Archived from the original on February 22, 2018. Retrieved May 12, 2021.
80. ^ Evans, Paul (November 11, 2018). "RTU Rooftop Units explained". The Engineering Mindset. Archived from the original on January 15, 2021. Retrieved May 12, 2021.
81. ^ "water-cooled – Johnson Supply". studylib.net. 2000. Archived from the original on May 13, 2021. Retrieved May 12, 2021.
82. ^ "Water Cooled Packaged Air Conditioners" (PDF). Japan: Daikin. May 2, 2003. Archived (PDF) from the original on June 19, 2018. Retrieved May 12, 2021.
83. ^ "Water Cooled Packaged Unit" (PDF). Daikin. Archived (PDF) from the original on May 13, 2021. Retrieved May 12, 2021.
84. ^ Lun, Y. H. Venus; Tung, S. L. Dennis (November 13, 2019). Heat Pumps for Sustainable Heating and Cooling. Springer Nature. p. 25. ISBN 978-3-030-31387-6.
85. ^ Ghanbariannaeeni, Ali; Ghazanfarihashemi, Ghazalehsadat (June 2012). "Bypass Method For Recip Compressor Capacity Control". Pipeline and Gas Journal. 239 (6). Archived from the original on August 12, 2014. Retrieved February 9, 2024.
86. ^ "Heat Stroke (Hyperthermia)". Harvard Health. January 2, 2019. Archived from the original on January 29, 2021. Retrieved May 13, 2021.
87. ^ "Weather Related Fatality and Injury Statistics". National Weather Service. 2021. Archived from the original on August 24, 2022. Retrieved August 24, 2022.
88. ^ "Extreme Weather: A Guide to Surviving Flash Floods, Tornadoes, Hurricanes, Heat Waves, Snowstorms Tsunamis and Other Natural Disasters". Reference Reviews. 26 (8): 41. October 19, 2012. doi:10.1108/09504121211278322. ISSN 0950-4125. Archived from the original on January 21, 2024. Retrieved December 9, 2023.
89. ^ Jump up to:^{a b c} Gamarro, Harold; Ortiz, Luis; González, Jorge E. (August 1, 2020). "Adapting to Extreme Heat: Social, Atmospheric, and Infrastructure Impacts of Air-Conditioning in Megacities—The Case of New York City". Journal of Engineering for Sustainable Buildings and Cities. 1 (3). doi:10.1115/1.4048175. ISSN 2642-6641. S2CID 222121944.
90. ^ Spiegelman, Jay; Friedman, Herman; Blumstein, George I. (September 1, 1963). "The effects of central air conditioning on pollen, mold, and bacterial concentrations". Journal of Allergy. 34 (5): 426–431. doi:10.1016/0021-8707(63)90007-8. ISSN 0021-8707. PMID 14066385.
91. ^ Portnoy, Jay M.; Jara, David (February 1, 2015). "Mold allergy revisited". Annals of Allergy, Asthma & Immunology. 114 (2): 83–89. doi:10.1016/j.anai.2014.10.004. ISSN 1081-1206. PMID 25624128.
92. ^ "Subpart 4-1 – Cooling Towers". New York Codes, Rules and Regulations. June 7, 2016. Archived from the original on May 13, 2021. Retrieved May 13, 2021.
93. ^ Nordhaus, William D. (February 10, 2010). "Geography and macroeconomics: New data and new findings". Proceedings of the National Academy of Sciences. 103 (10): 3510–3517. doi:10.1073/pnas.0509842103. ISSN 0027-8424. PMC 1363683. PMID 16473945.
94. ^ Barreca, Alan; Deschenes, Olivier; Guldi, Melanie (2018). "Maybe next month? Temperature shocks and dynamic adjustments in birth rates". Demography. 55 (4): 1269–1293. doi:10.1007/s13524-018-0690-7. PMC 7457515. PMID 29968058.
95. ^ Glaeser, Edward L.; Tobio, Kristina (January 2008). "The Rise of the Sunbelt". Southern Economic Journal. 74 (3): 609–643. doi:10.1002/j.2325-8012.2008.tb00856.x.
96. ^ Sherman, Peter; Lin, Haiyang; McElroy, Michael (2018). "Projected global demand for air conditioning associated with extreme heat and implications for electricity grids in poorer countries". Energy and Buildings. 268: 112198. doi:10.1016/j.enbuild.2022.112198. ISSN 0378-7788. S2CID 248979815.
97. ^ Air Filters Used in Air Conditioning and General Ventilation Part 1: Methods of Test for Atmospheric Dust Spot Efficiency and Synthetic Dust Weight Arrestance (Withdrawn Standard). British Standards Institution. March 29, 1985. BS 6540-1:1985.
98. ^ Mutschler, Robin; Rüdisüli, Martin; Heer, Philipp; Eggimann, Sven (April 15, 2021). "Benchmarking cooling and heating energy demands considering climate change, population growth and cooling device uptake". Applied Energy. 288: 116636. Bibcode:2021ApEn..28816636M. doi:10.1016/j.apenergy.2021.116636. ISSN 0306-2619.
99. ^ Jump up to:^{a b} "Climate-friendly cooling could cut years of Greenhouse Gas Emissions and save US$ trillions: UN". Climate Change and Law Collection. doi:10.1163/9789004322714_cclc_2020-0252-0973.
100. ^ Gerretsen, Isabelle (December 8, 2020). "How your fridge is heating up the planet". BBC Future. Archived from the original on May 10, 2021. Retrieved May 13, 2021.
101. ^ Encyclopedia of Energy: Ph-S. Elsevier. 2004. ISBN 978-0121764821.
102. ^ Corberan, J.M. (2016). "New trends and developments in ground-source heat pumps". Advances in Ground-Source Heat Pump Systems. pp. 359–385. doi:10.1016/B978-0-08-100311-4.00013-3. ISBN 978-0-08-100311-4.
103. ^ Roselli, Carlo; Sasso, Maurizio (2021). Geothermal Energy Utilization and Technologies 2020. MDPI. ISBN 978-3036507040.
104. ^ "Cooling Emissions and Policy Synthesis Report: Benefits of cooling efficiency and the Kigali Amendment, United Nations Environment Programme - International Energy Agency, 2020" (PDF).
105. ^ Harlan, Sharon L.; Declet-Barreto, Juan H.; Stefanov, William L.; Petitti, Diana B. (February 2013). "Neighborhood Effects on Heat Deaths: Social and Environmental Predictors of Vulnerability in Maricopa County, Arizona". Environmental Health Perspectives. 121 (2): 197–204. Bibcode:2013EnvHP.121..197H. doi:10.1289/ehp.1104625. ISSN 0091-6765. PMC 3569676. PMID 23164621.
106. ^ Jump up to:^{a b} Chan, Emily Ying Yang; Goggins, William B; Kim, Jacqueline Jakyoung; Griffiths, Sian M (April 2012). "A study of intracity variation of temperature-related mortality and socioeconomic status among the Chinese population in Hong Kong". Journal of Epidemiology and Community Health. 66 (4): 322–327. doi:10.1136/jech.2008.085167. ISSN 0143-005X. PMC 3292716. PMID 20974839.
107. ^ Ng, Chris Fook Sheng; Ueda, Kayo; Takeuchi, Ayano; Nitta, Hiroshi; Konishi, Shoko; Bagrowicz, Rinako; Watanabe, Chiho; Takami, Akinori (2014). "Sociogeographic Variation in the Effects of Heat and Cold on Daily Mortality in Japan". Journal of Epidemiology. 24 (1): 15–24. doi:10.2188/jea.JE20130051. PMC 3872520. PMID 24317342.
108. ^ Stafoggia, Massimo; Forastiere, Francesco; Agostini, Daniele; Biggeri, Annibale; Bisanti, Luigi; Cadum, Ennio; Caranci, Nicola; de'Donato, Francesca; De Lisio, Sara; De Maria, Moreno; Michelozzi, Paola; Miglio, Rossella; Pandolfi, Paolo; Picciotto, Sally; Rognoni, Magda (2006). "Vulnerability to Heat-Related Mortality: A Multicity, Population-Based, Case-Crossover Analysis". Epidemiology. 17 (3): 315–323. doi:10.1097/01.ede.0000208477.36665.34. ISSN 1044-3983. JSTOR 20486220. PMID 16570026. S2CID 20283342.
109. ^ Jump up to:^{a b c d} Gronlund, Carina J. (September 2014). "Racial and Socioeconomic Disparities in Heat-Related Health Effects and Their Mechanisms: a Review". Current Epidemiology Reports. 1 (3): 165–173. doi:10.1007/s40471-014-0014-4. PMC 4264980. PMID 25512891.
110. ^ O'Neill, M. S. (May 11, 2005). "Disparities by Race in Heat-Related Mortality in Four US Cities: The Role of Air Conditioning Prevalence". Journal of Urban Health: Bulletin of the New York Academy of Medicine. 82 (2): 191–197. doi:10.1093/jurban/jti043. PMC 3456567. PMID 15888640.
111. ^ Jump up to:^{a b} Sampson, Natalie R.; Gronlund, Carina J.; Buxton, Miatta A.; Catalano, Linda; White-Newsome, Jalonne L.; Conlon, Kathryn C.; O’Neill, Marie S.; McCormick, Sabrina; Parker, Edith A. (April 1, 2013). "Staying cool in a changing climate: Reaching vulnerable populations during heat events". Global Environmental Change. 23 (2): 475–484. Bibcode:2013GEC....23..475S. doi:10.1016/j.gloenvcha.2012.12.011. ISSN 0959-3780. PMC 5784212. PMID 29375195.
112. ^ Niktash, Amirreza; Huynh, B. Phuoc (July 2–4, 2014). Simulation and Analysis of Ventilation Flow Through a Room Caused by a Two-sided Windcatcher Using a LES Method (PDF). World Congress on Engineering. Lecture Notes in Engineering and Computer Science. Vol. 2. London. eISSN 2078-0966. ISBN 978-9881925350. ISSN 2078-0958. Archived (PDF) from the original on April 26, 2018. Retrieved May 13, 2021.
113. ^ Zhang, Chen; Kazanci, Ongun Berk; Levinson, Ronnen; Heiselberg, Per; Olesen, Bjarne W.; Chiesa, Giacomo; Sodagar, Behzad; Ai, Zhengtao; Selkowitz, Stephen; Zinzi, Michele; Mahdavi, Ardeshir (November 15, 2021). "Resilient cooling strategies – A critical review and qualitative assessment". Energy and Buildings. 251: 111312. Bibcode:2021EneBu.25111312Z. doi:10.1016/j.enbuild.2021.111312. hdl:2117/363031. ISSN 0378-7788.
114. ^ Linden, P. F. (1999). "The Fluid Mechanics of Natural Ventilation". Annual Review of Fluid Mechanics. 31: 201–238. Bibcode:1999AnRFM..31..201L. doi:10.1146/annurev.fluid.31.1.201.
115. ^ Santamouris, M.; Asimakoupolos, D. (1996). Passive cooling of buildings (1st ed.). London: James & James (Science Publishers) Ltd. ISBN 978-1-873936-47-4.
116. ^ Leo Samuel, D.G.; Shiva Nagendra, S.M.; Maiya, M.P. (August 2013). "Passive alternatives to mechanical air conditioning of building: A review". Building and Environment. 66: 54–64. Bibcode:2013BuEnv..66...54S. doi:10.1016/j.buildenv.2013.04.016.
117. ^ M.j, Limb (January 1, 1998). "BIB 08: An Annotated Bibliography: Passive Cooling Technology for Office Buildings in Hot Dry and Temperate Climates".
118. ^ Niles, Philip; Kenneth, Haggard (1980). Passive Solar Handbook. California Energy Resources Conservation. ASIN B001UYRTMM.
119. ^ "Cooling: The hidden threat for climate change and sustainable goals". phys.org. Retrieved September 18, 2021.
120. ^ Ford, Brian (September 2001). "Passive downdraught evaporative cooling: principles and practice". Arq: Architectural Research Quarterly. 5 (3): 271–280. doi:10.1017/S1359135501001312. ISSN 1474-0516. S2CID 110209529.
121. ^ Jump up to:^{a b} Chen, Meijie; Pang, Dan; Chen, Xingyu; Yan, Hongjie; Yang, Yuan (2022). "Passive daytime radiative cooling: Fundamentals, material designs, and applications". EcoMat. 4. doi:10.1002/eom2.12153. S2CID 240331557. Passive daytime radiative cooling (PDRC) dissipates terrestrial heat to the extremely cold outer space without using any energy input or producing pollution. It has the potential to simultaneously alleviate the two major problems of energy crisis and global warming.
122. ^ Raman, Aaswath P.; Anoma, Marc Abou; Zhu, Linxiao; Rephaeli, Eden; Fan, Shanhui (November 2014). "Passive radiative cooling below ambient air temperature under direct sunlight". Nature. 515 (7528): 540–544. Bibcode:2014Natur.515..540R. doi:10.1038/nature13883. PMID 25428501.
123. ^ Jump up to:^{a b} Bijarniya, Jay Prakash; Sarkar, Jahar; Maiti, Pralay (November 2020). "Review on passive daytime radiative cooling: Fundamentals, recent researches, challenges and opportunities". Renewable and Sustainable Energy Reviews. 133: 110263. Bibcode:2020RSERv.13310263B. doi:10.1016/j.rser.2020.110263. S2CID 224874019.
124. ^ Mokhtari, Reza; Ulpiani, Giulia; Ghasempour, Roghayeh (July 2022). "The Cooling Station: Combining hydronic radiant cooling and daytime radiative cooling for urban shelters". Applied Thermal Engineering. 211: 118493. Bibcode:2022AppTE.21118493M. doi:10.1016/j.applthermaleng.2022.118493.
125. ^ Yang, Yuan; Zhang, Yifan (July 2020). "Passive daytime radiative cooling: Principle, application, and economic analysis". MRS Energy & Sustainability. 7 (1). doi:10.1557/mre.2020.18.
126. ^ Miranda, Nicole D.; Renaldi, Renaldi; Khosla, Radhika; McCulloch, Malcolm D. (October 2021). "Bibliometric analysis and landscape of actors in passive cooling research". Renewable and Sustainable Energy Reviews. 149: 111406. Bibcode:2021RSERv.14911406M. doi:10.1016/j.rser.2021.111406.
127. ^ Jump up to:^{a b} Needham, Joseph; Wang, Ling (1991). Science and Civilisation in China, Volume 4: Physics and Physical Technology, Part 2, Mechanical Engineering. Cambridge University Press. ISBN 978-0521058032. OCLC 468144152.
128. ^ Dalley, Stephanie (2002). Mari and Karana: Two Old Babylonian Cities (2nd ed.). Piscataway, New Jersey: Gorgias Press. p. 91. ISBN 978-1931956024. OCLC 961899663. Archived from the original on January 29, 2021. Retrieved May 13, 2021.
129. ^ Nagengast, Bernard (February 1999). "Comfort from a Block of Ice: A History of Comfort Cooling Using Ice" (PDF). ASHRAE Journal. 41 (2): 49. ISSN 0001-2491. Archived (PDF) from the original on May 13, 2021. Retrieved May 13, 2021.
130. ^ Bahadori, Mehdi N. (February 1978). "Passive Cooling Systems in Iranian Architecture". Scientific American. 238 (2): 144–154. Bibcode:1978SciAm.238b.144B. doi:10.1038/SCIENTIFICAMERICAN0278-144.
131. ^ Smith, Shane (2000). Greenhouse Gardener's Companion: Growing Food and Flowers in Your Greenhouse Or Sunspace. Illustrated by Marjorie C. Leggitt (illustrated, revised ed.). Golden, Colorado: Fulcrum Publishing. p. 62. ISBN 978-1555914509. OCLC 905564174. Archived from the original on May 13, 2021. Retrieved August 25, 2020.

Air Conditioning Repair Companies