H2GO Power is a pioneering cleantech company. They develop and deliver hydrogen energy storage technology for zero-emission, safe and reliable power supply, with a range of commercial applications.

Haley Mechanical, headquartered in Dexter, Michigan, is one of the pre-eminent residential HVAC companies in Michigan, servicing the Ann Arbor area. Services provided include Heating, Cooling, Geothermal Heating, HVAC, Plumbing, Electrical, Generators, Air Quality, Repair and Installation, and Drain Cleaning.

At Handyside Plumbing, HVAC & Electrical, they are a family owned and operated plumbing, heating, air conditioning and electrical business in Etters, PA. Giving their customers the friendly personal service of yesterday with the technical know-how of a constantly changing profession is just a sample of what makes them special.

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.

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.

Harvey-Cleary Builders are a leading, full-service general contractor headquartered in Houston, Texas. They provide general contracting, preconstruction, design-build and construction management services for a variety of commercial projects nationwide.

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.

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.

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.

At Heartland Heating & Cooling, they're more than just a repair company – they're home comfort specialists. Their team has extensive experience servicing and repairing all makes and models of residential heating and cooling equipment. Their mission is to provide prompt, professional, quality heating & cooling services to their customers in the Central Ohio area, and to build a reputation as being honest and committed to customer satisfaction.

At Heat Different, they carry out in-house design, supply and installation of a wide array of renewable, gas and oil heating systems, including ground source heat pumps, air source heat pumps, biomass boilers and solar thermal. They pride themselves on quality installation using quality well-engineered products, designed to every property’s bespoke requirement by their in-house design team.

Heat Merchants supplies a comprehensive portfolio of heating, plumbing and renewable energy solutions for both domestic and commercial projects. They also provide a range of support services to customers include heating system design and specification, commissioning, ancillary certification, after-sale service and installer training.

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.

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.

Herrera Heating and Air Conditioning Inc are more than just an HVAC company in Westminster – they’re partners in creating comfortable and efficient living and working environments. And as a trusted family-owned HVAC contracting company with over 30 years of experience, they pride themselves on delivering comprehensive services for both residential and commercial properties in Westminster and the entire Metro Denver area.

Hewer Facilities Management has evolved into one of the region's pioneering building services, installation and maintenance providers, employing over 100 staff, and the reputation for quality is the foundation of the company.

Hitachi Rail is a fully integrated, global provider of rail solutions across rolling stock, signaling, operation, service & maintenance, digital technology and turnkey solutions.

Hobson & Porter is a family owned construction company with offices in Kingston Upon Hull and Lincoln, operating across Yorkshire and Lincolnshire regions, in the United Kingdom. They operate a Quality Management System which complies with the requirements of ISO 9001: 2015 for the construction of building works for both public and private clients incorporating new construction, renovation, refurbishment and minor works contracts.

Holliday Heating + Cooling + Electric has been a trusted name in the Spokane and Coeur d’Alene areas since 1987. When it comes to home comfort and electrical needs, Doc and Chris are the go-to company. Serving the Inland Northwest with 24/7 emergency service, choose Holliday Heating + Cooling + Electric for furnace, air conditioning, electrical, or air quality, or other home comfort repairs and new installations.

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.

Homans Associates is the premier distributor of HVAC Equipment, Supplies and Mechanical Insulation products in the Northeast. We've been serving the contractor community since 1952 with locations across all of New England plus New York and New Jersey. Our logistics network includes over 80 trucks and almost 1 million square feet of distribution space.

Hoval develops and supplies premium solutions for heating, ventilation and air conditioning for buildings. Their solutions can be found in many of the world most remarkable landmarks like Windsor Palace, Vatican City and Burj Khalifa.

Hubbard Products Ltd. is one of the United Kingdom's renowned designers, manufacturers and suppliers of commercial cooling equipment and has earned an enviable Global reputation for innovation and design-led excellence.

Hurley & David provides residential HVAC Services and residential plumbing services. Since 1960, the business has been servicing Eastern MA and northern CT. They provide a wide range of plumbing services from air conditioning, furnace, boiler, or HVAC system installation, maintenance, and repair.

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.

HVAC Solution software is a dynamic interactive systems building software for HVAC systems design. The only software of its kind; built by engineers for engineers. HVAC Solution Pro software helps you design air handing, airflow, hydronic and steam systems.

HVAC Specialist Inc. provides expert AC repair and installation in Hawthorne, New York, as well as furnace repairs in Mount Kisco, Bedford, and Armonk, New York, USA. With skilled contractors and the right tools, they ensure the system runs smoothly year-round. Their maintenance services help prevent emergencies and maintain peak performance. They prioritize customer satisfaction, keeping them cool in summer and warm in winter.