At Altherm they specialize in the design, installation, maintenance and repair of Air Conditioning and Refrigeration systems from small commercial systems to industrial process cooling. Their vision is to provide the most up to date and cost effective heating and cooling systems to the clients.

Alton/Aztec provides direct, indirect, and indirect/direct evaporative cooling equipment, heating equipment, and make-up equipment.

American Residential Services (ARS) is a brand of American Residential Services LLC., which provides heating, air conditioning, indoor air quality, plumbing, drain cleaning and sewer line services from company-owned locations across the United States of America (USA). United by exceptional service, the ARS® / Rescue Rooter® Network serves both residential and light commercial customers.

AMETEK, Inc. is a global provider of industrial technology solutions serving a diverse set of attractive niche markets with annual sales over $6.0 billion. AMETEK has over 18,500 colleagues at more than 150 operating locations in 30 countries around the world. Their mission is to solve their customers' most complex challenges with differentiated technology solutions.

Amitime is a professional manufacturer and worldwide supplier of sophisticated air to water heat pump, fan coil units, swimming pool heat pump and a variety of other energy-saving environmental control system and products.

AMWEI Thermistor Sensor design and manufacture PTC & NTC thermistors (THERMally sensitive resistors), thermistor temperature sensors probe. AMWEI started Thermistors business back in 1999, thorough successive hard work of a group of specialists in ceramic sensitive material, welding technology, packaging technology. They own core know-how in powder formula and key production technics.

Since 1954, The Anderson-Snow Corporation has served the chemical, food, oil and gas, pharmaceutical, pulp and paper, utility, and general industrial markets by manufacturing the highest quality coils. They manufacture Heat Exchangers, Coils, Welding, and Fabrication materials.

Manufacturer and supplier of level, flow and pressure switches and level transmitters for chillers and other HVAC applications.

At Apollo, their customers are at the core of everything they do. They understand the importance of reliable heating systems in cold climates and the impact they have on the well-being of individuals and the efficiency of businesses. That's why they are dedicated to providing superior products, exceptional customer service, and continuous innovation.

Applegate Heating & Air Conditioning specializes in heating, air conditioning, and sheet metal work. It serves residential, commercial, and industrial projects. It specializes in sheet metal design, fabrication, and installation for projects of all sizes, ranging from $100 to $25,000,000.

Applied Air is a renowned manufacturer of HVAC equipment, ideal for controlling the temperature and quality of the indoor air in any commercial or industrial building. Their products include packaged dedicated outdoor air systems and ventilation equipment, direct gas fired, indirect gas fired, air turnover, and evaporative cooling systems. Applied Air HVAC systems can provide makeup air, ventilation air, space heating and space cooling.

APR Supply Co. is a third generation wholesale distributor of plumbing and HVAC products with locations in Pennsylvania, New Jersey, and Delaware.

Apreco Limited design and supply air pressure stabilizers and pressure relief vents to protect & safeguard individuals and companies. They provide Custom Air Pressure Relief Valves, Pressure Relief Vents, Operating suites, Cleanrooms, Data centers, Pressurized Stairwells and much more.

Aprilaire designs, manufactures and brings to market a range of whole-home indoor air quality (IAQ) solutions. Their product line includes humidifiers, air cleaners, fresh air exchangers, zone control systems, electronic thermostats, air filters and related equipment, dehumidifiers, HVAC automation equipment including communicating thermostats, communication panels, software.

Aqua Cooler offers a host of products and solutions to the market as well as a resource-packed aftermarket service. With over 50 years in refrigeration and an intimate understanding of the customer’s process cooling needs allow them to provide an unparalleled level of specialized aftermarket service.

Based in the North West UK, Aqua Products' range of signature Aquatexx bivvies, brollies and camp gear are internationally renowned. They also offer chillers, condensing units and ventilation products for the HVAC industry.

Aqua Systems Incorporated has been manufacturing highly efficient (liquid to refrigerant) heat exchangers for over 30 years. Apart from heat exchangers, they also provide condensers, evaporators, and oil coolers, and heat exchangers with built-in bi-directional receiver.

Arabian Air Conditioning Manufacturing Company (AMCO) is one of Almalki Group Holding company in Qatar. AMCO is partnering with ACS Klima as joint venture under the brand of CLIMACS. AMCO is established to supply the needs of Qatar, Bahrain, Kuwait, UAE, Jordan, Egypt and other middle east countries in air conditioning sector.

Armstrong Fluid Technology is known as an innovator in the design, engineering and manufacturing of intelligent fluid-flow equipment. This global fluid technology solutions company's solutions are applied in residential, commercial and industrial installations in some of the worlds premier facilities.

Armstrong International provides intelligent system solutions that improve utility performance, lower energy consumption, and reduce environmental emissions while providing a comfortable experience. They are innovators and globally leaders in intelligent system solutions for steam, air, and hot water.

Arrow Heating & Cooling has been offering the best air conditioning and heating services to the Columbus,Ohio area for over 30 years.

Artus is a revolutionary heating and air conditioning product. A perfect solution for all applications including residential, commercial and high-precision environments. It is a fully-packaged unit offering significant advantages over fan coil and chilled beam systems.

Arup is the creative force at the heart of many of the world’s most prominent projects in the built environment and across industry. They offer a broad range of professional services that combine to make a real difference to the clients and the communities.

Atlanta Airheads (formerly Wilheck Air) is the answer to all the air conditioning and heating requirements. They serve homeowners and companies in metro Atlanta. Since 1988, they are happy to state several of the clients have stayed with them.

Atlantic Chemical & Equipment Co., is an Atlanta-based HVAC equipment manufacturer, offering a complete range of chemical treatments for use in the HVAC/R markets. Products offered include coil cleaners, refrigeration oils, aerosol products, IAQ products, condensate repair products, refrigerant line flushing/acid removal and many more.

Atlantic Westchester is a commercial Heating Ventilation Air Conditioning (HVAC) company dedicated to making buildings smarter while providing the highest quality service in the industry. Since 1961, catered to clients across the NY metro area with proactive maintenance, remediation and installation services based on their unique facility needs.

Atlas Copco has been turning industrial ideas into business-critical benefits since 1873. By listening to the customers and knowing their needs, they deliver value and innovate with the future in mind. Their compressors, vacuum solutions, generators, pumps, power tools and assembly systems can be found everywhere. They provide compressed air and gas equipment, generators, industrial tools and assembly systems, and vacuum pumps.

Atmosphere has been a major player in the ventilation industry for over 26 years. Founded on the principles of innovation and reliability, they have established themselves as a trusted provider of ventilation products in North America with the Vortex Powerfan line of products.

Aughinish Alumina is one of the most technologically advanced and energy efficient facilities worlwide. Europe’s largest alumina refinery and a major alumina asset of RUSAL, the facility infrastructure includes a deepwater terminal on the Shannon estuary that facilitates efficient deliveries to European smelters.

Aura is a comprehensive, NABERS compliant, web based after-hours scheduling system for AC and Lighting. It saves time and money for tenants and facilities operatives alike by offering an easy to use online interface for tenants to set after-hours schedules and building managers to invoice and collect usage data.