COSA is a not for profit organization that provides educational programs in the areas of carbon monoxide and combustion analysis. These programs are provided to people in the medial field, first responders, and the mechanical trades.

Carrier Corp. is a global residential product innovations and solutions firm. Their inventory includes advanced communicating controls and thermostats, high-efficiency split system air conditioners and heat pumps, ductless split systems, gas and oil furnaces, boilers, fan and evaporator coils, geothermal systems, zoning systems, a complete line of indoor air quality products and small packaged products.

CE Mechanical is premier HVAC mechanical contractor, specializing in comprehensive services, including installation, maintenance, retrofits, and tenant improvements. With a dedicated focus on quality and customer satisfaction, they proudly serve all of Southern California. CE Mechanical’s innovative solutions help to lower operating costs, reduce capital expenditures, and maximize value for their clients.

Founded in 1946, Century Heating and Cooling Products, A MARS Co. is a family-owned and operated supplier of quality motors, components, service/installation parts, and equipment for the HVAC/R industry. The company’s Equipment Division offers residential and commercial heating, cooling, and dehumidification equipment under the Comfort-Aire and Century brand names in the United States and under the Comfort-Aire by Aitons brand name in Canada. The

CG Plumbing deals in both domestic and commercial mechanical installations along with installation of UPVC soffits, fascia's and HVAC systems.

Chadds Ford Climate Control offers a broad range of skilled services to create a more comfortable, productive, and rewarding home and work environment. They specialize in both residential and light commercial applications. Their service contracts protect the sustainability of customers comfort systems, including generators, with service targeted at maximizing longevity, reliability, and energy efficiency.

As an independent Bryant dealer in the Indianapolis area, Chapman Heating offers a full range of heating and air conditioning products and equipment, including gas furnaces, air conditioners, thermostats, humidifiers, boilers, UV lamps and more.

Chatham Brass is a family owned and operated plumbing and electrical manufacturer located in central New Jersey, USA. They provide the plumbing and electrical industries with quality products such as pipe cable, electrical heating, silicone sealants, thermostats and controls, guards along with extensive inventory and exceptional customer care.

As a family-owned-and-operated business, Chris Mechanical Services, Inc is a Bryant Factory Authorized Dealer that offers expert installation and maintenance by their skilled team of factory-trained professionals.

Chromalox is a thermal technology company. They engineer thermal solutions for the world's toughest industrial heating applications. Their Heat Trace segment delivers temperature management solutions for piping systems, valves, and tanks.

Clean Air Systems of LA, Inc. is the one stop shop for commercial and residential air conditioning and duct cleaning services in Shreveport, Louisiana, USA. They are a Charter Member of National Air Duct Cleaners Association as well as a member of the Indoor Air Quality Association, the Comfort Institute, the Shreveport Bossier & National Home Builders Association, and the Better Business Bureau of Shreveport, LA.

Cleaver-Brooks is a complete boiler room solutions provider that manufactures hot water and steam generation products which maximize energy efficiency and reliability while minimizing emissions.

Coherent empowers market innovators to define the future through breakthrough technologies, from materials to systems. They deliver innovations that resonate with the customers in diversified applications for the industrial, communications, electronics, and instrumentation markets.

Since 1964, Cole Industrial has been the Northwest's provider of new, used and rental boiler equipment for the process and comfort heating needs of nearly every industry around. Their diverse product line includes boiler equipment from industry-leading Cleaver-Brooks, for which we are the region's sole manufacturers'​ representative.

Coleman is a manufacturer in America. They craft residential heat pumps, air conditioners, furnaces and light commercial equipment, gas furnaces, etc.

Collier Consulting Group, a proven pioneer in business management consulting, provides on-site evaluations, coaching services, and flat rate solutions.

At Comfort Boys their business is only as successful as the value they bring to their customers. From AC repair in San Antonio to an iced up AC unit in the Texas hill country. They strive to provide the greatest customer experience possible. This is the vision owner and operator David Schiess A Local resident saw as a critical component to providing the best possible service.

Comfort Solutions HVAC, a locally owned and operated residential heating and cooling company, prioritizes the well-being of its customers. Their expertise lies in ensuring comfort within the confines of homes, excelling in top-notch service, maintenance, and replacement of residential heating and air conditioning systems.

Comfort Systems USA is a national heating, ventilation and cooling (HVAC) company that offers a single company to provide complete HVAC service, anywhere, anytime.

Comfortmaker provides residential and light commercial heating and air conditioning products, condensing units, furnaces, heat pumps, accessories, 2-25 ton rooftop units.

Concord provides residential heating and air conditioning products, packaged units and splits systems under 5 tons. They produce long-lasting, affordable heating and cooling products in a state-of-the-art facility located in South Carolina. They use only proven materials for every furnace, air conditioner, heat pump and air handler they build.

Since its founding in 2008, Constant Home Comfort has serviced customers in Greater Toronto and surrounding areas, with high-quality, innovative and practical HVAC improvement products. They offer top-quality HVAC, furnace, and water tank services urgently. They also partner with renowned brands like Lennox, Bosch, Carrier, and more, offering a range of high-performance heat pumps.

Cool Air Technologies is one of Orange County’s most trusted names for heating and air, and for good reason. They offer greater warranty protection, with Orange County’s longest and most comprehensive install labor warrant.

Cora Duct Cleaning offers a wide array of air duct cleaning services for homes, commercial and industrial across Southern Ontario. Established in 2010, Cora has provided duct cleaning services to thousands of clients across the GTA and Ontario. Apart from duct cleaning, specialized air filters, furnace cleaning, dryer vent cleaning, a/c cleaning, central vacuum cleaning and other services are provided by the company.

Cosby Heating carries a complete line of indoor comfort equipment with innovations that raise the standards of comfort and reliability, including air conditioners, heat pumps, gas furnaces, programmable thermostats, humidifiers, ductless split systems, geothermal systems, boilers, air cleaners, ultra violet lights, ventilators and zoning products.

Servicing the South West, Cosgrove & Drew provide best in class mechanical engineering services, such as domestic installations, full industrial and commercial projects, and servicing and maintenance. They are a UK-based plumbing, heating, mechanical services and building maintenance company that undertakes the smallest maintenance work right through to complete refurbishment.

County Wide Mechanical is proud to service the heating, cooling, and plumbing needs of homes and businesses in Connecticut.

CPS Products, Inc. serves multiple industries with application-built, industry-specific innovations and advancements in technologies and products. The CPS product development team consists of engineers across all fields: electrical, mechanical, software and chemical and even HVAC/R. In addition, CPS invests heavily in industrial design so new product solutions reach state-of-the-art in aesthetics and ease-of-use.

Cunningham, Inc. is a mechanical contractor that believes in providing the highest value to customers with high-quality craftsmanship, and cutting edge technology. Their broad range of services include HVAC equipment, plumbing, electrical, architectural metals, industrial and commercial services, and Geo-thermal solutions.

Custom Controls Company is the manufacturer of explosion proof, hazardous location and industrial duty air conditioners, heaters, NFPA 496 building pressurizers, chillers and control panels - since 1960.