Harder Mechanical is a large nationally recognized contractor with an outstanding reputation for working safely, meeting tough schedules, delivering a quality project and coming in on budget. They provide HVAC, Plumbing, Process Piping, Steel Erection, Concrete Installation, Complex Equipment Installation, Design Assist/Build Service and much more.

HARDI is an association dedicated to advancing the science of wholesale distribution in the HVACR industry. HARDI members market and distribute heating, refrigeration, air conditioning equipment and supplies, sheet metal, controls, filters and related items.

Hardware & Electrical Co. L.L.C. (HEECO) was established in the year 1985 by Mr. Tommaso Briata and Mr. Abshir Mohamud with a vision to be the supplier of Building Materials, Hardware, Plumbing, Sanitary Pipes & Fittings and Electrical Equipment in the United Arab Emirates.

Harlen Johnson Heating & Air Conditioning is an HVAC company that provides reliable heating and air conditioning services for residential and commercial customers. They specialize in providing the most effective solution for the home or company.

Harmon Heating and Cooling Inc is an HVAC Company that provides remarkable HVAC services to both residential and commercial customers in Omaha and the surrounding counties.

Harris Air Heating and Air Conditioning is an HVAC company in Benton, AR. They specialize in repairing and installing all makes and models of heating and air conditioning units at affordable rates.

Harris Air Services is a known resource for heating and air conditioning services in McKinney and the surrounding areas. They are a locally owned and operated company that specializes in residential HVAC installation, repair, and maintenance.

Harry Alter Co. is a renowned US-based wholesale distribution of heating and air conditioning equipment, parts and supplies. They provide furnaces, air conditioners, hydronic heating solutions and refrigeration supplies.

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.

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.

Hartell has manufactured innovative, high quality, condensate, wastewater, ice machine and general purpose pumps to the HVAC, plumbing and refrigeration industries.

Hartman Brothers Heating & Air Conditioning Inc is a full service HVAC company based in New Haven, IN. They offer a wide variety of products and services including installation; engineering; sheet metal fabrication; custom designed heating, cooling, and ventilation systems.

Harts Services was founded in Tacoma in 2013 by co-owners Richard Hart and Dan Hartsough. Harts Plumbers, Electricians and HVAC Technicians offers residential plumbing, electrical and HVAC solutions and has a 4.9/5 rating on Google. Guided by its motto, We Care More, the company is committed to incorporating a caring attitude into every aspect of the business.

Hastings HVAC, Inc. is a pioneer in commercial and industrial heating, ventilating and air-conditioning systems. They offer a company-staffed field solution to ensure Hastings' items are properly built, properly set up and correctly serviced.

Hatch Company was established in 1985 with over 30 years’ experience as a manufacturer’s rep firm serving Western Canada, and the northern Territories. They provide solutions for the HVAC/R marketplace, focused on institutional, commercial, multi-family residential, and industrial construction projects. They cater their services to both the new construction and the retrofit markets.

Hatcher Heating & Air Inc is a locally owned and operated HVAC company in Pensacola, FL. They pride themselves on providing the best possible service to all their customers.

HAUSER, with headquarters in Linz-Urfahr, is a successful full-service provider of refrigeration cabinets and refrigeration technology throughout Europe. They offer their international customers everything from a single source: innovative, energy-saving cooling solutions, as well as complete project management and service.

HAVEN develops air monitoring technologies and connected (IoT) products, focused on detection of common particles and chemicals that affect human health. HAVEN has designed a proprietary laser-based particle detecting technology that is miniature, accurate and reliable; costing a small fraction of other sensors on the market with similar capabilities. Their software platform processes a large amount of environmental data.

Hawco is an international distributor and a UK wholesaler of HVAC products. They provide Refrigeration systems, Air Conditioning, Electrical Process & Control, HVACR, Components, Process Heating Control, and Process Heating.

Hawkins HVAC Distributors is a new company with a strong history in North Carolina set on delivering Charlotte and the surrounding areas the service it deserves. They provide parts of all residential and commercial HVAC systems.

Hayes Mechanical is a one stop, full service mechanical contractor specializing in both Commercial, Industrial, and Power-Generation related work.

Haynes Mechanical Systems has provided technical facilities services for the commercial real estate market since 1968. They focus on working together with the customers to provide solutions to their heating, ventilation, and air conditioning (HVAC) needs.

Since 1914, HB McClure has served homes and businesses in Central Pennsylvania by providing premier residential, commercial, and design/build mechanical services, including heating, cooling, plumbing, electrical, and fuel oil and propane delivery. Our expert technicians evaluate each job, recommend the best solutions, and allow the client to choose the right option for their needs.

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.

HD Supply, a wholly owned subsidiary of The Home Depot, is a leading wholesale distribution company serving customers and their communities across the Multifamily, Institutional, Hospitality, Trades, Government Housing, Healthcare, Building Services, and Education industries through an expansive network of over 100 distribution centers across the U.S. & Canada.

HDR | Hurley Palmer Flatt Group is the UK’s leading independent multidisciplinary engineering consultancy, providing solutions for the built environment. HDR | Hurley Palmer Flatt Group is Headquartered in London, and comprises of: - HDR | Hurley Palmer Flatt - HDR | Andrew Reid - HDR | Bradbrook Consulting - HDR | Concentre Consulting

Head’s Heating & Air Conditioning is an HVAC company that offers complete heating and air conditioning services in the Mobile and Baldwin county area. Their company was established in the year 1979.

Health and Safety Executive (HSE) is the national independent watchdog for work-related health, safety and illness. Their mission is to prevent death, injury and ill health in Britain's workplaces. They are an independent regulator and act in the public interest to reduce work-related death and serious injury across Great Britain’s workplaces.

Heating and air conditioning equipment for residential and commercial applications, 1/2 to 25 tons, under the Comfort-Aire and Century brand names.

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.