- Trane Company (1)
- Carrier Corporation (6)
- York International
 - Supplier of heating, ventilating, air conditioning, and refrigeration equipment. - NuTone Inc.
- Manufactures built-in home convenience products.
- Watlow
- Designs and manufactures industrial heaters, sensors and controls. Provides thermal system integration, custom capabilities, and engineering support.
- Taco, Inc.
- Developer and supplier of hydronic-based heating and cooling components for both residential and commercial applications.
- Modine Manufacturing Company
- Makers of heat-transfer and heat-storage technology, serving vehicular, industrial, commercial, and building-HVAC markets.
- Allied Air Enterprises
- Source for heating and cooling solutions. Allied Air Enterprises brings together the collective strengths of Armstrong Air, AirEase, Ducane, Concord, Magic-Pak, and Allied Commercial.
- Goodman Manufacturing
- Consumer site. Offers air conditioning and heating products. Also includes dealer locator, warranty, and financing information.
- Copeland Corporation
- Production of residential and commercial air conditioning and refrigeration compressors and condensing units.
 Armstrong Pumps
- Manufactures circulators, hydronics, pumps, heat exchangers, and expansion equipment.- Ducane
- Maker of gas grills and accessories.
- Myson Ltd
- Manufacture radiators, fan convectors, towel warmers and other components for hot water central heating.
- Invensys Climate Controls Europe
- Serves the commercial refrigeration, residential, and light commercial HVAC markets.
- Buderus Hydronic Systems
- Manufacturer of high efficiency boilers, water heaters, radiant heat panels, and climate controls for homes and businesses.
- Mestek, Inc (1)
- Bard Manufacturing Company
- Manufacturer of air conditioners, furnaces and heat pumps designed for the residential, commercial, school and telecommunication markets.
- Ranex
- Manufactures gas ovens, boilers, fan heaters, infrared stoves, appliances and ranges.
- Vent Axia, Ltd.
- Manufactures and markets a range of fan products and accessories to provide domestic, commercial and industrial ventilation solutions.
- Des Champs Laboratories Incorporated
- Developing innovative solutions for energy recovery, outside air conditioning, improved indoor air quality, and air to air heat exchangers.
- Chromalox
- Wiegand division. Manufacturer of electric heating elements for industrial and consumer markets, appliance OEMs, and the replacement market.
- Glacier Bay, Inc.
- Refrigeration, air conditioning and environmental control technologies for marine and electric vehicles.
- Infiltec Air Leakage Control
- Assisting contractors and homeowners in solving radon mitigation and building air leakage measurement and control problems.
- Therma-Stor Products
- Manufactures heat recovery systems, heat pump water heaters, ventilation systems and dehumidifiers.
- MTS Group
- Manufactures electric and gas water heaters, bathtubs, sinks, gas boilers, and air conditioning units.
- Environmental Technologies, Inc. (1)
- Edwards Engineering Corp.
- Manufactures valance heating and cooling systems, stainless steel baseboards, and chillers.
- E.H. Price Limited
- Manufacturer and distributor of air distribution systems including registers, grilles, diffusers, air quality systems, terminal units, and controllers.
- Farnam Custom Products
- Manufacturing air, inline process, and surface heaters.
- International Comfort Products (1)
- Alltemp Products Company Limited
- Manufactures and distributes various air conditioning, refrigeration, heating and ventilating, vacuum, appliance and electric motor and industrial pump parts throughout Canada.
- Belimo
- Develops, manufactures, and sells heating, ventilation, and air-conditioning system actuators.
- Captive-Aire Systems, Inc.
- Manufactures industrial ventilation equipment including commercial kitchen hoods, heaters, and exhaustfans.
- Baxi Heating Ltd
- Manufacturer of boilers, gas and solid fuel fires, and wall heaters.
- Nortek
- Manufacturer of residential building products.
- Venmar Ventilation Inc.
- Manufacturer of energy saving, recovery, and source ventilators, range hoods and ventilation systems.
- Heat-Fab Inc.
- Manufactures Saf-T gas vent and chimney relining systems for commercial and residential appliances.
- Babington Technology
- Designer of air atomizing oil burners, military tray ration heating systems, and ammonia cycle refrigeration.
- Berg Chilling Systems, Inc.
- Specialising in process cooling, chillers, cooling towers, pumping systems, marine and food processing refrigeration and ice machines.
- Honeywell Inc.
- Discusses home comfort, health, and safety issues. Get advice on controlling home/office living environments as well as research products, safeguards, and solutions.
- ITT Industries
- Supplier of HVAC equipment including pumps, valves, controls for hydronic heating, chilled water, and steam systems.
- HydroThrift Corporation
- Custom engineered Industrial Packaged cooling systems.
- Carlyle
- Offers refrigeration and air conditioning compressors.
- Carrier Corp.
- Offering air cleaners, conditioners, boilers, evaporator coils, gas furnaces, and more.
- Villavent
- Manufactures heat recovery ventilation systems, air pollution filtering, and central vacuum systems for commercial, residential, and industrial applications.
- Gledhill Water Storage
- Manufacturers of copper cylinders and heating appliances. Suppliers to the trade only.
- Backwell IXL Australia
- Manufactures home heating and ventilation appliances.
- Stelpro
- Manufacturer of electric heating products for residential, commercial, industrial, and architectural use.
- Bessam-Aire, Inc.
- Manufacturer of industrial evaporative cooling, make up air, combination heating and cooling, indirect fired air turnover, and custom built equipment.
- LSB Industries
- Diversified manufacturing, marketing, and engineering company whose core businesses manufacture and sell chemicals and climate control products.
- Cross Electrical (Nottingham) Ltd
- Specialises in the design, manufacture, supply and installation of electrical trace heating systems incorporating a thermal insulation division.
- Process Heating Company
- Manufacturer of industrial electric heating systems including immersion and circulation heaters as well as complete heat transfer systems.
- Westinghouse Heating and Cooling
- Manufacturer of heating, cooling, and air comfort products.
- Hollingsworth & Vose Air Filtration Ltd
- Specialises in the manufacture of non-woven media for use in air filtration.
 RVR Ltd.
- Manufactures heating, ventilation, and air conditioning equipment.- Caryaire
- Products include grills, difusers, dampers, intake louvers, heat transfer coil, ventilation units, and more.
- Nordic Air Incorporated
- Manufactures heavy duty heating, ventilating, filtering, and air conditioning products for industrial applications.
- Lanemark International Ltd.
- Involved in the design, manufacture, supply, and service of gas fired process heating equipment.
- Powrmatic Heater Manufacturing Company
- Industrial and commercial heaters and air cleaners.
- Miniveil Systems
- Carrier of air curtains and doors for the use of creating an air seal. Includes product history and information.
- R.L.M. Benelux BV
- Manufacturers of heat pumps, boilers, storage tanks, water treatment equipment, and more.
- Wozair, Waterloo-Ozonair Ltd
- Heating, ventilation, and air conditioning equipment and design for the oil and gas, petrochemical, energy, nuclear, and process industries.
- Woods of Colchester, Ltd.
- Designs and manufactures air movement equipment.
- Gellert Company, The
- Providing raw product storage ventilation systems.
- EDPAC International Limited
- Manufacturers of precision/close control air-conditioning equipment.
- Colt International Limited
- Provider of smoke control and architectural and climate control systems, products, and services.
- Sun Aire
- Electric heaters and purifiers manufactured by Better Living.
- Axair
- Manufactures a range of air conditioning, humidification, and HVAC climate control systems.
- Combat Engineering Ltd.
- Designs and manufactures gas and oil fired warm air heaters for use in industrial and commercial buildings.
- Coenco
- Offers the Coenco Positive Air System for precise control and reduced energy use in the heating and cooling of large buildings.
- Kwang Jin HVAC Engineering and Manufacturing Company
- Manufactures diffusers, grilles, registers, and attenuators.
- Seung-Il Electronics
- Offers a complete line of HVAC products including electric steam humidifiers, MICOM controllers, PC monitoring systems, and temperature/humidity transmitters.
- Spirax Sarco - United Kingdom & Eire
- Provides steam users with knowledge, service, and products to improve and maintain steam heating and process plants.
- Heatbusters
- Manufactures portable air conditioners.
- Stork Bronswerk
- Canadian group offers custom climate control systems and consulting for the shipping industry, military uses, airport and building complexes, and many other industries.
- Flow Center Products Inc.
- Manufacturers and distributors of loop pumps for geothermal closed loop ground source heating and cooling systems.
- Goodman Global
- Goodman Global engages in engineering, manufacturing, assembling, marketing, and distributing heating, ventilation, and air conditioning (HVAC) products for the residential and light commercial markets in the United States and Canada.
- VA Equipment Corporation
- Manufacturer and distributor of explosion-proof heating, ventilation, and air conditioning equipment including compressors, fans, and thermostats.
- Garbutt Heaters Ltd
- Manufactures tailor-made heating appliances suitable for gas, oil, LPG, direct and indirect fired.
- Welco Industries
- Manufacturer of 400Hz and other specialised refrigeration and air conditioning compressors.
- Wellman Robey
- Manufacturers of industrial boilers and pressure vessels.
- Korel Electronics Ltd.
- Offers heating and cooling elements including flexible rope heaters and tube evaporators. Based in Turkey.
- Accuchill Manufacturing Inc.
- Manufacturers of chillers, tank sets, and cooling towers.
- Peregrine Industries
- Manufacturers of heat pump pool heaters, as well as air conditioners and parallel flow coils.
- FastCurbs
- Manufacturer of roof curbs, RTU curbs, RTU adapters, metal roof curbs, and other commercial HVAC sheet metal products.
- RenewAire
- Manufactures energy recovery ventilators using the Mitsubishi Lossnay static plate enthalpy exchange core.
- ScentralAire
- Programmable central fragrancing and humidification device used in residential and workplace environments via HVAC systems.
- Hyco Manufacturing Ltd.
- Makes and distributes water heaters, quartz heaters, hand dryers, and related products.
- LRC Coil Company
- Manufacturer of refrigeration and HVAC coils and equipment.
- Weatherite Limited
- Manufacturers of bespoke air conditioning and air handling equipment.
- Wuhu HVACR Corp.
- Chinese manufacturer of air conditioning, refrigeration, ventilation, heating, plumbing, and water treatment products.
- Air Terminal Ltd
- Manufacturers of aluminium air grilles, diffusers, louvres, and dampers.
- Tridan Tool & Machine, Inc.
- Manufacturer of machinery for the production of evaporators and condensers used in manufacturing air conditioning and refrigeration systems.
- Bry-Air, Inc.
- Manufactures desiccant dehumidifiers for industrial humidity and environmental control, as well as dryers and auxiliary equipment for the plastics industry.
- American Standard Heating and Air Conditioning
- American Standard manufactures air conditioners, air purifiers, air cleaners, heating systems, furnaces, and programmable thermostats.
- Celmec International
- Designs and manufactures outdoor heating and cooling solutions, including shade structure systems with heating and lighting, infra-red gas radiant heaters, and shade structures with Celmist cooling systems.
- Lennox Indoor Comfort Systems
- Learn more about commerical and residential HVAC equipment from Lennox. Includes complete air conditioning and heating product information, case studies, and current promotions.
- Lennox International
- Provider of climate control solutions for heating, air conditioning, and refrigeration markets worldwide. Lennox International provides residential and commercial heating and cooling solutions, service experts, and refrigeration systems.
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