CCK is a manufacturing company specializing in the production of ventilation equipment, air handling units, fans, heat exchangers, smoke extraction systems, fire dampers, ventilation accessories.

CEMLINE manufactures tanks, pressure vessels, packaged water heaters, unfired steam clean generators, and replacement tube bundles to suit customer requirements since 1935. Their products are used for the storing and heating of water and liquids in plumbing and heating systems and industrial processes.

Cenergist is a pioneer water and energy management company. It specializes in high efficiency district heating and ground source heat pump systems together with water efficiency products. The company is based in the UK and has subsidiaries in Spain and India.

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

Cesaroni Technology is specialized in applying engineering polymers to non-traditional applications. They develop high-performance polymeric heat exchangers.

At Cetra Srl, for over 30 years they have been operating in the field of design, production and sale of air handling, ventilation and heat recovery units for the residential, commercial, industrial and chemical pharmaceutical sectors.

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

CGS Group Impianti srl was born in 1971 and since then it has been present on the national and foreign market in the field of environmental reclamation of the air.

Chester-Jenseis Co. Inc. is a manufacturer of sanitary stainless steel heat exchange and other processing equipment. They also provide refrigeration evaporators, water chillers, thermal storage equipment, ice builders and many more.

Chevron's greatest resource is their people. They provide Crude Oil & Natural Gas Production, Liquefied Natural Gas, Refining, Motor & Jet Fuel, Lubricants, Additives and Petrochemicals Marketing, Energy & Supply Trading, Energy Technologies, Energy Efficiency Solutions, Pipelines, and Shipping.

Christmas Air has always been great to work with as they offer regular maintenance for HVAC equipment and valuable discounts on their services and new equipment. They offer free estimates for heating & air conditioning equipment replacement.

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.

CIAT is a pioneer in heat pump heating, summer comfort and air handling solutions for the residential, commercial, healthcare and industrial sectors. CIAT provides solutions based on three fundamentals - comfort, optimization of energy consumption, and improvement of indoor air quality of buildings.

Cinch Home Services is a home services company that makes it easy for everyone to enjoy their home to the fullest. Cinch complete home plan covers appliances from refrigerators and ovens to washers, dryers and more. They provide warranty plans for air conditioning, heating, plumbing and electrical components.

ClearVent USA is a trusted provider of air duct and dryer vent cleaning services across residential and commercial properties. With a focus on indoor air quality and energy efficiency, their experienced team uses advanced equipment to remove dust, debris, and allergens—promoting healthier living and safer ventilation systems.

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.

Cleveland Tool And Machine began as a manufacturer of high quality automated machinery for the production of Sheet Metal Fittings in 1996. We have grown to be the major supplier of such equipment in the United States and Canada.

CLIMACIAT represents the modern air handling units that CIAT has been offering for more than 40 years. The first air handling units were produced more than 80 years ago. Ecodesign is a very important component of the studies for the CLIMACIAT Airaccess/Airtech/Airclean range. The resulting product has a low environmental impact, in terms of its constituent materials and their recyclability.

CLIMASET provides modular regulation solutions and supervision systems for applications and systems of refrigeration, air conditioning, heating and air humidification.

As a locally owned and operated company, Climate Control Systems stands behind their work. Owned and operated by the same family for over 50 years, they provide customers with the best HVAC service in Frankfort and the surrounding areas. All of their technicians are trained and skilled. They perform background checks on all the employees to ensure the homes and businesses are safe in their hands.

CM Heating™ has proudly served Snohomish County, WA for over 40 years, CM Heating™ is among the very top-rated HVAC contractors in Washington State. CM Heating specializes in energy-efficient systems, such as standard heat pumps and ductless heat pumps. The company provides a combination of the best reputation, brands, warranties, craftsmanship, and price all backed by a 100% satisfaction guarantee.

CO2Meter, is identified as a "leading source" for gas detection, monitoring, and analytical solutions. Since 2006, CO2Meter continues to work diligently to utilize the latest, proven gas sensing technologies in order to solve the urgent needs of partners, customers, and professionals across the industry.

Coats Mechanical is a local Texas Hill Country HVAC/R company where superior service happens every day! They proudly have over 20 years of comprehensive experience in both residential and commercial HVAC systems. They also specialize in wine cellar/room climate control. They solve the toughest comfort challenges and keep heating and cooling systems running efficiently.

Cody & Sons is a family-owned and operated HVAC service company, specializing in residential plumbing, heating and air repair and remodels.

COES bases its activity on long term tradition in the field of industrial machines. Their team, with 50 years of experience in engineering and production, led the company through the 20 years anniversary mark.

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.

Colmac Coil Manufacturing supplies heating and cooling coils to OEM customers and the HVAC industry. They also provide unit coolers; air cooled condensers; blast freezers; hydrocoolers; fluid coolers and heat pipes.

Colmac heat pump water heaters offer commercial and industrial users of sanitary hot water an energy efficient means of heating water to temperatures as high as 185°F (85°C) in a single pass. These heat pump water heaters use the same operating principle as an air-conditioner or domestic refrigerator.

At COLOMBO AEROMECHANICS, since 1958 they have been solving the most varied problems in the field of industrial heat engineering and is based out of Italy.