{"wikiid":16769,"langid":"en","namespace":"CATEGORY","title":"HVAC","revisionid":2676397,"contents_raw":"== Background and Identification ==\n\nHVAC stands for heating, ventilation, and air conditioning. It is the technology used to provide thermal comfort and acceptable air quality indoors and in vehicles. The system design of HVACs are a sub-discipline of mechanical engineering, based on principles of thermodynamics, fluid mechanics, and heat transfer. Sometimes, \u201crefrigeration\u201d is all added to the field of HVACs as HVAC&R or HVACR.  \u201cVentilation\u201d is sometimes dropped to form HACR especially in the designation of HACR-related [https:\/\/en.wikipedia.org\/wiki\/Circuit_breaker|circuit breakers.]\n\nThe purpose of HVACs are to provide good air quality and appropriate thermal comfort especially in residential structures such as single family homes, apartment buildings, hotels and senior living facilities, and medium to large industrial and office buildings including skyscrapers and hospitals. Moreover, HVACs are also important in vehicles such as cars, trains, airplanes, ships, and submarines. Speaking of submarines, HVACs are also required in marine environments where safe and healthy building conditions are regulated with respect to temperature and humidity, with the use of fresh air from outdoors.\n\nIn terms of air quality, the \u201cV\u201d in HVAC is for ventilation, the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture and odors, heat, smoke, dust, airborne bacteria, and carbon dioxide among other gases.  Ventilation is important as it eliminates unpleasant smells and excessive moisture by introducing fresh outside air. This process keeps the air circulating.\n\n== Additional Information ==\n\n[http:\/\/en.wikipedia.org\/wiki\/HVAC|Wikipedia: HVAC]","contents_json":{"type":"doc","content":[{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Background and Identification"}]},{"type":"paragraph","content":[{"type":"text","text":"HVAC stands for heating, ventilation, and air conditioning. It is the technology used to provide thermal comfort and acceptable air quality indoors and in vehicles. The system design of HVACs are a sub-discipline of mechanical engineering, based on principles of thermodynamics, fluid mechanics, and heat transfer. Sometimes, \u201crefrigeration\u201d is all added to the field of HVACs as HVAC&R or HVACR.  \u201cVentilation\u201d is sometimes dropped to form HACR especially in the designation of HACR-related "},{"type":"text","marks":[{"type":"link","attrs":{"href":"https:\/\/en.wikipedia.org\/wiki\/Circuit_breaker","target":false}}],"text":"circuit breakers."}]},{"type":"paragraph","content":[{"type":"text","text":"The purpose of HVACs are to provide good air quality and appropriate thermal comfort especially in residential structures such as single family homes, apartment buildings, hotels and senior living facilities, and medium to large industrial and office buildings including skyscrapers and hospitals. Moreover, HVACs are also important in vehicles such as cars, trains, airplanes, ships, and submarines. Speaking of submarines, HVACs are also required in marine environments where safe and healthy building conditions are regulated with respect to temperature and humidity, with the use of fresh air from outdoors."}]},{"type":"paragraph","content":[{"type":"text","text":"In terms of air quality, the \u201cV\u201d in HVAC is for ventilation, the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture and odors, heat, smoke, dust, airborne bacteria, and carbon dioxide among other gases.  Ventilation is important as it eliminates unpleasant smells and excessive moisture by introducing fresh outside air. This process keeps the air circulating."}]},{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Additional Information"}]},{"type":"paragraph","content":[{"type":"text","marks":[{"type":"link","attrs":{"href":"http:\/\/en.wikipedia.org\/wiki\/HVAC","target":false}}],"text":"Wikipedia: HVAC"}]}]},"contents_rendered":"<div class=\"clearer\"><\/div><div class=\"headerContainer\"><a class=\"selfLink\" href=\"#Section_Background_and_Identification\" title=\"Link to this section\" aria-hidden=\"true\" tabindex=\"-1\"><span    class=\"fa-svg-icon\"><svg width=\"16\" height=\"16\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\" overflow=\"visible\"><!--! Font Awesome Pro 7.3.1 by @fontawesome - https:\/\/fontawesome.com License - https:\/\/fontawesome.com\/license (Commercial License) Copyright 2026 Fonticons, Inc. --><path d=\"M427.5 88c-21.4 0-42.2 6.9-59.3 19.4-11.4-11.7-24.4-22.1-38.4-30.7 27-23.6 61.7-36.7 97.7-36.7 82 0 148.5 66.5 148.5 148.5 0 39.4-15.6 77.1-43.5 105l-79.1 79.1c-27.8 27.8-65.6 43.5-105 43.5-82 0-148.5-66.5-148.5-148.5 0-17.9 3.2-35.5 9.4-51.9 4.6-12.4 18.5-18.7 30.9-14.1S259 220 254.4 232.4c-4.2 11.1-6.4 23-6.4 35.2 0 55.5 45 100.5 100.5 100.5 26.6 0 52.2-10.6 71-29.4l79.1-79.1C517.4 240.6 528 215.1 528 188.5 528 133 483 88 427.5 88zm-200 56c-26.6 0-52.2 10.6-71 29.4L77.4 252.5c-18.8 18.8-29.4 44.4-29.4 71 0 55.5 45 100.5 100.5 100.5 21.4 0 42.2-6.9 59.3-19.4 11.4 11.8 24.4 22.1 38.4 30.7-27 23.6-61.7 36.7-97.7 36.7-82 0-148.5-66.5-148.5-148.5 0-39.4 15.6-77.1 43.5-105l79.1-79.1c27.8-27.8 65.6-43.5 105-43.5 82 0 148.5 66.5 148.5 148.5 0 17.9-3.2 35.5-9.4 51.9-4.6 12.4-18.5 18.7-30.9 14.1S317 292 321.6 279.6c4.2-11.1 6.4-23 6.4-35.1 0-55.5-45-100.5-100.5-100.5z\"\/><\/svg><\/span><\/a><h2 id=\"Section_Background_and_Identification\" class=\"header\">Background and Identification<\/h2><\/div>\n\n<p>HVAC stands for heating, ventilation, and air conditioning. It is the technology used to provide thermal comfort and acceptable air quality indoors and in vehicles. The system design of HVACs are a sub-discipline of mechanical engineering, based on principles of thermodynamics, fluid mechanics, and heat transfer. Sometimes, \u201crefrigeration\u201d is all added to the field of HVACs as HVAC&amp;R or HVACR.  \u201cVentilation\u201d is sometimes dropped to form HACR especially in the designation of HACR-related <a href=\"https:\/\/en.wikipedia.org\/wiki\/Circuit_breaker\">circuit breakers.<\/a><\/p>\n\n<p>The purpose of HVACs are to provide good air quality and appropriate thermal comfort especially in residential structures such as single family homes, apartment buildings, hotels and senior living facilities, and medium to large industrial and office buildings including skyscrapers and hospitals. Moreover, HVACs are also important in vehicles such as cars, trains, airplanes, ships, and submarines. Speaking of submarines, HVACs are also required in marine environments where safe and healthy building conditions are regulated with respect to temperature and humidity, with the use of fresh air from outdoors.<\/p>\n\n<p>In terms of air quality, the \u201cV\u201d in HVAC is for ventilation, the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture and odors, heat, smoke, dust, airborne bacteria, and carbon dioxide among other gases.  Ventilation is important as it eliminates unpleasant smells and excessive moisture by introducing fresh outside air. This process keeps the air circulating.<\/p>\n\n<div class=\"clearer\"><\/div><div class=\"headerContainer\"><a class=\"selfLink\" href=\"#Section_Additional_Information\" title=\"Link to this section\" aria-hidden=\"true\" tabindex=\"-1\"><span    class=\"fa-svg-icon\"><svg width=\"16\" height=\"16\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\" overflow=\"visible\"><!--! Font Awesome Pro 7.3.1 by @fontawesome - https:\/\/fontawesome.com License - https:\/\/fontawesome.com\/license (Commercial License) Copyright 2026 Fonticons, Inc. --><path d=\"M427.5 88c-21.4 0-42.2 6.9-59.3 19.4-11.4-11.7-24.4-22.1-38.4-30.7 27-23.6 61.7-36.7 97.7-36.7 82 0 148.5 66.5 148.5 148.5 0 39.4-15.6 77.1-43.5 105l-79.1 79.1c-27.8 27.8-65.6 43.5-105 43.5-82 0-148.5-66.5-148.5-148.5 0-17.9 3.2-35.5 9.4-51.9 4.6-12.4 18.5-18.7 30.9-14.1S259 220 254.4 232.4c-4.2 11.1-6.4 23-6.4 35.2 0 55.5 45 100.5 100.5 100.5 26.6 0 52.2-10.6 71-29.4l79.1-79.1C517.4 240.6 528 215.1 528 188.5 528 133 483 88 427.5 88zm-200 56c-26.6 0-52.2 10.6-71 29.4L77.4 252.5c-18.8 18.8-29.4 44.4-29.4 71 0 55.5 45 100.5 100.5 100.5 21.4 0 42.2-6.9 59.3-19.4 11.4 11.8 24.4 22.1 38.4 30.7-27 23.6-61.7 36.7-97.7 36.7-82 0-148.5-66.5-148.5-148.5 0-39.4 15.6-77.1 43.5-105l79.1-79.1c27.8-27.8 65.6-43.5 105-43.5 82 0 148.5 66.5 148.5 148.5 0 17.9-3.2 35.5-9.4 51.9-4.6 12.4-18.5 18.7-30.9 14.1S317 292 321.6 279.6c4.2-11.1 6.4-23 6.4-35.1 0-55.5-45-100.5-100.5-100.5z\"\/><\/svg><\/span><\/a><h2 id=\"Section_Additional_Information\" class=\"header\">Additional Information<\/h2><\/div>\n\n<p><a href=\"http:\/\/en.wikipedia.org\/wiki\/HVAC\">Wikipedia: HVAC<\/a><\/p>","linked_wikis":[],"can_edit":true,"available_langids":["en","de","es","fr","it","jp","ko","nl","pt","ru","tr","zh"],"ancestors":[{"dataType":"wiki","wikiid":783,"langid":"en","title":"Household","display_title":"Household","namespace":"CATEGORY","summary":"DIY guides for many household repairs, ranging from furniture to plumbing solutions.","url":"https:\/\/www.ifixit.com\/Device\/Household","text":"DIY guides for many household repairs, ranging from furniture to plumbing solutions.","image":{"id":3076820,"guid":"IbYeQcWW16qkPfWE","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/IbYeQcWW16qkPfWE.full"},"modified_date":1792688696,"author":17},{"dataType":"wiki","wikiid":11000,"langid":"en","title":"Root","display_title":"Root","namespace":"CATEGORY","summary":"","url":"https:\/\/www.ifixit.com\/Device\/Root","text":"Repair guides, manuals, and troubleshooting help for Root. Get everything you need to repair your Root 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Ensure your heating system operates efficiently with our professional insights and community-driven advice.","image":{"mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.thumbnail","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.standard","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.medium"},"modified_date":1792688924,"author":1117590},{"dataType":"wiki","wikiid":631042,"langid":"en","title":"Calorifer","display_title":"Calorifer","namespace":"CATEGORY","summary":"A calorifer is a type of heat exchanger used to transfer heat from hot water, steam, or another heat source into air or another medium. Calorifers are common in heating, ventilation, and air conditioning (HVAC) systems, industrial facilities, and marine applications. Depending on the design, they can be used for space heating, preheating ventilation air, or process heating.","url":"https:\/\/www.ifixit.com\/Device\/Calorifer","text":"A calorifer is a type of heat exchanger used to transfer heat from hot water, steam, or another heat source into air or another medium. Calorifers are common in heating, ventilation, and air conditioning (HVAC) systems, industrial facilities, and marine applications. Depending on the design, they can be used for space heating, preheating ventilation air, or process heating.","image":{"id":3734988,"guid":"nXZnuOkNP5M1eGjh","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.large","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/nXZnuOkNP5M1eGjh.full"},"modified_date":1755171210,"author":1757552},{"dataType":"wiki","wikiid":236031,"langid":"en","title":"Carrier","display_title":"Carrier","namespace":"CATEGORY","summary":"Repair guides for all Carrier furnaces, air conditioners, and more.","url":"https:\/\/www.ifixit.com\/Device\/Carrier","text":"Repair guides for all Carrier furnaces, air conditioners, and more.","image":{"id":1758925,"guid":"GlfO2uiJmroNF2rE","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.large","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/GlfO2uiJmroNF2rE.full"},"modified_date":1711400304,"author":1500101},{"dataType":"wiki","wikiid":12856,"langid":"en","title":"Dehumidifier","display_title":"Dehumidifier","namespace":"CATEGORY","summary":"Information and repair guides for dehumidifier repair, an appliance that removes humidity from the air in your home.","url":"https:\/\/www.ifixit.com\/Device\/Dehumidifier","text":"Information and repair guides for dehumidifier repair, an appliance that removes humidity from the air in your home.","image":{"id":3337014,"guid":"ITYdQ22B1I4SMQh2","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/ITYdQ22B1I4SMQh2.full"},"modified_date":1717545599,"author":543269},{"dataType":"wiki","wikiid":642778,"langid":"en","title":"RADIADOR DUCASA BRD9001","display_title":"DUCASA BRD9001 RADIATOR","namespace":"CATEGORY","summary":"DUCASA radiator, a Spanish brand, with electronics that are relatively simple to repair.","url":"https:\/\/www.ifixit.com\/Device\/RADIADOR_DUCASA_BRD9001","text":"DUCASA radiator, a Spanish brand, with electronics that are relatively simple to repair.","image":{"id":4044915,"guid":"gCWutJQoCxoaKdGT","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/gCWutJQoCxoaKdGT.full"},"modified_date":1788408307,"author":1252901},{"dataType":"wiki","wikiid":615826,"langid":"en","title":"Duco Box Silent","display_title":"Duco Box Silent","namespace":"CATEGORY","summary":"","url":"https:\/\/www.ifixit.com\/Device\/Duco_Box_Silent","text":"Repair guides, manuals, and troubleshooting help for Duco Box Silent. Get everything you need to repair your Duco Box Silent yourself.","image":{"mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.thumbnail","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.standard","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.medium"},"modified_date":1788404737,"author":1766853},{"dataType":"wiki","wikiid":120921,"langid":"en","title":"fireplace","display_title":"Fireplace","namespace":"CATEGORY","summary":"Maintenance and repair info for fireplaces.","url":"https:\/\/www.ifixit.com\/Device\/fireplace","text":"Maintenance and repair info for fireplaces.","image":{"id":3097808,"guid":"HFlwRNG1aUQQKjTp","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HFlwRNG1aUQQKjTp.full"},"modified_date":1792750586,"author":2567860},{"dataType":"wiki","wikiid":553340,"langid":"en","title":"Fr\u00f6ling P2 Pelletsheizung","display_title":"Fr\u00f6ling P2 Pellet Heating System","namespace":"CATEGORY","summary":"Pellet heating systems from the Austrian manufacturer Fr\u00f6ling are recommended for both modern new buildings and renovations. Pellet boilers are fully automatic heating systems that function similarly to oil or gas heating systems. The fuel is automatically transported from a storage room to the boiler.\nDepending on the control system of the pellet heating unit, it is also possible to connect solar thermal systems, secondary boilers, and other components.","url":"https:\/\/www.ifixit.com\/Device\/Fr%C3%B6ling_P2_Pelletsheizung","text":"Pellet heating systems from the Austrian manufacturer Fr\u00f6ling are recommended for both modern new buildings and renovations. Pellet boilers are fully automatic heating systems that function similarly to oil or gas heating systems. The fuel is automatically transported from a storage room to the boiler.\nDepending on the control system of the pellet heating unit, it is also possible to connect solar thermal systems, secondary boilers, and other components.","image":{"id":3271190,"guid":"HcroguIrlJBjQRPg","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/HcroguIrlJBjQRPg.full"},"modified_date":1788402018,"author":1757552},{"dataType":"wiki","wikiid":553544,"langid":"en","title":"Furnace","display_title":"Furnace","namespace":"CATEGORY","summary":"A furnace is a heating system that warms air or water through combustion of fuel or electricity, distributing heat throughout a building via ducts or pipes. Efficient and powerful, furnaces are central to home heating, offering quick temperature rise and consistent warmth.","url":"https:\/\/www.ifixit.com\/Device\/Furnace","text":"A furnace is a heating system that warms air or water through combustion of fuel or electricity, distributing heat throughout a building via ducts or pipes. Efficient and powerful, furnaces are central to home heating, offering quick temperature rise and consistent warmth.","image":{"mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.thumbnail","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.standard","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.medium"},"modified_date":1714666066,"author":292420},{"dataType":"wiki","wikiid":553543,"langid":"en","title":"Heat Pump","display_title":"Heat Pump","namespace":"CATEGORY","summary":"A heat pump is an energy-efficient system that provides heating and cooling by transferring heat between indoors and outdoors.","url":"https:\/\/www.ifixit.com\/Device\/Heat_Pump","text":"A heat pump is an energy-efficient system that provides heating and cooling by transferring heat between indoors and outdoors.","image":{"mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.thumbnail","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.standard","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.medium"},"modified_date":1792689004,"author":292420},{"dataType":"wiki","wikiid":633522,"langid":"en","title":"Honeywell Rondostat HR20 (Style)","display_title":"Honeywell Rondostat HR20 (Style)","namespace":"CATEGORY","summary":"Electronic radiator valve for time-controlled room temperature regulation.","url":"https:\/\/www.ifixit.com\/Device\/Honeywell_Rondostat_HR20_%28Style%29","text":"Electronic radiator valve for time-controlled room temperature regulation.","image":{"id":3798628,"guid":"YGbxOLCHPEpn1gZS","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YGbxOLCHPEpn1gZS.full"},"modified_date":1788407435,"author":4876748},{"dataType":"wiki","wikiid":114622,"langid":"en","title":"Honeywell RTHL3550D Non-Programmable Thermostat","display_title":"Honeywell RTHL3550D Non-Programmable Thermostat","namespace":"CATEGORY","summary":"","url":"https:\/\/www.ifixit.com\/Device\/Honeywell_RTHL3550D_Non-Programmable_Thermostat","text":"Repair guides, manuals, and troubleshooting help for Honeywell RTHL3550D Non-Programmable Thermostat. Get everything you need to repair your Honeywell RTHL3550D Non-Programmable Thermostat yourself.","image":{"id":3448981,"guid":"r6D6FTXe6vQgKbIT","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/r6D6FTXe6vQgKbIT.full"},"modified_date":1789593374,"author":2435517},{"dataType":"wiki","wikiid":14920,"langid":"en","title":"Fan","display_title":"Household Fan","namespace":"CATEGORY","summary":"Repair guides and support for all household mechanical fans including ceiling, box, tower, and stand fans.","url":"https:\/\/www.ifixit.com\/Device\/Fan","text":"Repair guides and support for all household mechanical fans including ceiling, box, tower, and stand fans.","image":{"id":3337022,"guid":"FF2wqf6axwp5OSUR","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/FF2wqf6axwp5OSUR.full"},"modified_date":1792688948,"author":18},{"dataType":"wiki","wikiid":401593,"langid":"en","title":"humidifier","display_title":"Humidifier","namespace":"CATEGORY","summary":"Repair guides and support for home humidifiers.","url":"https:\/\/www.ifixit.com\/Device\/humidifier","text":"Repair guides and support for home humidifiers.","image":{"id":3337016,"guid":"PiN5e6XwD62O6LXQ","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/PiN5e6XwD62O6LXQ.full"},"modified_date":1792689117,"author":3264503},{"dataType":"wiki","wikiid":635038,"langid":"en","title":"Laing KR10 Fu\u00dfbodenheizung-Regelung","display_title":"Laing KR10 Underfloor Heating Controller","namespace":"CATEGORY","summary":"","url":"https:\/\/www.ifixit.com\/Device\/Laing_KR10_Fu%C3%9Fbodenheizung-Regelung","text":"Repair guides, manuals, and troubleshooting help for Laing KR10 Underfloor Heating Controller. Get everything you need to repair your Laing KR10 Underfloor Heating Controller yourself.","image":{"mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.thumbnail","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.standard","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/MMDDXSBMgLlQyYDe.medium"},"modified_date":1788407445,"author":1766853},{"dataType":"wiki","wikiid":237614,"langid":"en","title":"Portacool Cooler PAC2KCYC01 2015","display_title":"Portacool Cooler PAC2KCYC01 (2015)","namespace":"CATEGORY","summary":"The Portacool Cooler model PAC2KCYC01, also called the Cyclone 130 3000, is a two-speed portable evaporative cooler.","url":"https:\/\/www.ifixit.com\/Device\/Portacool_Cooler_PAC2KCYC01_2015","text":"The Portacool Cooler model PAC2KCYC01, also called the Cyclone 130 3000, is a two-speed portable evaporative cooler.","image":{"id":1860324,"guid":"aHWLqrxX1GCsWoaM","mini":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.mini","thumbnail":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.thumbnail","140x105":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.140x105","200x150":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.200x150","standard":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.standard","440x330":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.440x330","medium":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.medium","large":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.large","huge":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.huge","original":"https:\/\/guide-images.cdn.ifixit.com\/igi\/aHWLqrxX1GCsWoaM.full"},"modified_date":1792615088,"author":1},{"dataType":"wiki","wikiid":237615,"langid":"en","title":"Portacool Cooler PACCY130GA1 2019","display_title":"Portacool Cooler PACCY130GA1 (2019)","namespace":"CATEGORY","summary":"Repair guides for the Portacool Cyclone 130, an evaporative cooling fan with model number PACCY130GA1 or just PACCY130. This fan was released in 2019, and is part of the Cyclone series of Portacool fans.","url":"https:\/\/www.ifixit.com\/Device\/Portacool_Cooler_PACCY130GA1_2019","text":"Repair guides for the Portacool Cyclone 130, an evaporative cooling fan with model number PACCY130GA1 or just PACCY130. This fan was released in 2019, and is part of the Cyclone series of Portacool 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