GrayWolf manufactures indoor air quality measurement instrumentation that helps optimize the balance between building energy savings and occupant performance, comfort and health. GrayWolf is dedicated to providing reliable, high quality products.

Great Guys is one of the fastest growing Technician Owned HVAC & Electrical companies in the Denver Metro! Their trusted Heating, Cooling, Ventilation & Electrical technicians solve all HVAC problems, and make recommendations for improved solutions to ensure the home or business is always comfortable, efficient and safe. They offer comprehensive services and equipment that are uniquely selected to best meet varying needs.

At Green Refrigeration LLC, they will take care of all commercial refrigeration, HVAC services, custom wine cellars, glycol chillers, walk-in coolers & freezers, food equipment, Ice machines (cubers & flakers), Ice machine rental, cold storage solutions, gelato machines, and commercial hot water heaters needs from start to finish. They provide high-quality services for commercial & residential customers in Palm Beach, FL.

Haley Comfort Systems are distributors of AC units, furnaces, heat pumps, thermostats, CO2 alarms, dehumidifiers, humidifiers, purifiers, filters, UV lamps, fireplaces and more.

Halpern - Jacobs represents the premier manufacturers of Heating, Ventilating, Air Conditioning, and Refrigeration Equipment and After Market Parts.

Harry Eklof & Associates Inc. is a manufacturer representative. They offer training services and also connect the user to the following products: Plumbing, HVAC, Bath Fixtures, Sump Sewage, Tools.

Harshaw Trane creates and sustains high performing, efficient and secure facility environments. They partner with many of the top-ranked private and public institutions on innovative technology and systems that optimize performance while minimizing energy use and reducing costs over the entire lifecycle of a building.

Hart-Hammer, Inc. is a US-based provider of sales and engineering support in Iowa, Nebraska, the Quad Cities, and Western Illinois. They represent 27 HVAC manufacturers including AAON, Nailor, Ruskin, CamFil, Strobic, and many others. The company focuses on heating and air conditioning services for commercial/institutional and temperature control/measurement for hospitals and laboratories.

As an American Standard Customer Care dealer, Hartley’s Climate Control takes pride in 'selling the best and servicing the rest'. It helps customers in their HVAC system purchases as they know purchasing a home comfort system can often be a daunting task.

HBB Pro Sales Group Inc. is a representative of high quality HVAC/R products lines in Ohio, Kentucky, Indiana, Michigan, Western Pennsylvania, and West Virginia.

The Heat Exchange Institute (HEI) is a non-profit trade association committed to the technical advancement, promotion, and understanding of a broad range of utility and industrial-scale heat exchange and vacuum apparatus. The primary purpose of HEI is to develop and publish standards which advance the technology, increase the efficiency, and promote the use of heat exchange and vacuum apparatus.

Heat Pump Federation lobbies government for long term policy supporting the electrification of heating and cooling, works to raise awareness, understanding and confidence in heat pump technology across both domestic and commercial sectors, and collaborates with government, industry and consumers to make this a reality.

With 16 locations in Canada and the United States, HTS has grown significantly as a full-service, custom HVAC equipment provider since its establishment in 1992. Their products inventory includes chillers, heat pumps, air handling units, valves, building automation systems, heat exchangers, fan coil units, humidifiers and dehumidifiers.

HeatFix Scotland Ltd is the market leader in Scotland for service & repair on all renewable and carbon-fueled heating appliances. They are the number one choice in Scotland for professional boiler repairs, servicing, and boiler cover.

For over 125 years, Redlands and Henry Bush Plumbing, Heating, and Air have been proudly serving the Inland Empire community with top-notch HVAC service and expertise. When it comes to any plumbing and HVAC needs, they're the leaders who customers can rely on for honest service. Their experienced team is dedicated to exceptional service.

Since its founding in 1910, Hitachi has responded to the expectations of society and its customers through technology and innovation. They provide a wide range of services, including HVAC systems, Information & Telecommunication Systems, Social Infrastructure & Industrial Systems, Electronic Systems & Equipment, Construction Machinery, High Functional Materials & Components, Automotive Systems, Smart Life & Ecofriendly Systems.

For nearly 20 years, Holtzople Heating and Air Conditioning has been a leading HVAC company serving central Maryland and southern Pennsylvania, featuring star brands such as Trane, Lennox, Carrier, Bryant, ClimateMaster and more. Holtzople provides complete installation, repair and preventive maintenance agreements for residential heat pumps and air conditioners, as well as oil and gas furnaces and boilers.

Hometown Comfort Pros Heating and Air provide heating and air conditioning services in Forest Virginia, Bedford Virginia, Evington Virginia, Madison Heights Virginia, Amherst Virginia, and Smith Mountain Lake Virginia regions.

Honeywell Home solutions include connected thermostats, whole-home professionally installed and monitored security systems, do-it-yourself home awareness and security systems, carbon monoxide and fire detection devices, furnace and boiler controls, water leak and freeze detection products, whole-home air purifiers and humidifiers.

Honeywell is a provider of custom-engineered sensors, switches and controls, and productivity solutions built around its high performance data collection hardware including rugged mobile computers, voice-enabled software, bar code scanners, radio frequency identification (RFID) and workflow printing solutions. They also provide pressure sensors for HVAC and refrigeration equipment.

At Howell's Heating & Air believe in providing the greatest value possible by offering first class service as well as uncompromising quality at a reasonable price. Over 40 years and a generation later, Howell’s remains true to this original philosophy and attributes its success and reputation to their great owners, for their hard work every single day.

Hugh M. Cunningham Companies offers premier sales representation to all distribution sectors of the HVAC and Refrigeration markets in the US States of Texas, Louisiana, New Mexico, Oklahoma and Arkansas.

AC & Heating Equipment Rental are the air treatment specialists who understand the critical importance of air quality and building systems. Founded by three seasoned experts with a combined experience of over 40 years in rent air conditioner and heater rentals, they are passionate about providing exceptional solutions to meet unique client needs. They deliver their services 24/7 across the provinces of Ontario and Quebec in Canada.

HVAC Erie specialize in air duct cleaning, air conditioning repair, and furnace repair in Erie, Pennsylvania, USA. They offer a full range of heating and cooling services, including furnace repair, air conditioning repair, and air duct cleaning. Their experienced technicians are available 24/7 for emergency repairs.

From heating and cooling to indoor air quality solutions, South Central Kentucky relies on HVAC Services, Inc. to provide the highest standards of service.

IERNA's Heating & Cooling offers Air, HVAC, Heating and Plumbing services for your home. We provide our customers with expert installers, experienced technicians, friendly customer service reps and the highest quality products available. Servicing the greater Tampa Bay area, our mission is to far exceed our customers expectations. IERNA Your Trust, IERNA Your Business is more of a mission statement than a slogan.

IERNA's Heating & Cooling offers quality air and expert HVAC service for customers home. They provide their customers with expert installers, knowledgeable, experienced technicians, and friendly customer service representatives.

IES Associates has been one of the largest independent providers of OEM compressors, compressor & chillers parts and technical services worldwide.

Illinois Tool Works (ITW) is a Fortune 200 global multi-industrial manufacturing leader with revenues totaling $14.5 billion in 2021. The company’s seven industry-leading segments leverage the unique ITW Business Model to drive solid growth with best-in-class margins and returns in markets where highly innovative, customer-focused solutions are required.

INFICON provides industry-renowned tools for HVAC/R service, including refrigerant and combustible gas leak detectors, combustion analyzers, refrigerant charging scales, refrigerant recovery machines, and vacuum pumps. INFICON is a major provider of innovative instrumentation, critical sensor technologies, and advanced process control software that enhance productivity and quality in sophisticated industrial vacuum processes.