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.

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

As Georgia’s #1 American Standard dealer, Holtkamp provides award-winning air conditioning repairs, AC replacement, and AC maintenance to Gwinnett County and surrounding areas from their Suwanee headquarters.

Holtop Canada supplies CSA-certified ductless ERVs built for modular, prefab, and energy-efficient homes. Their systems improve indoor air quality with quiet, efficient fresh air ventilation — no ductwork needed. With up to 82% heat recovery, they help builders and home owners save energy and breathe easier.

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.

Honey-Do-Men is an experienced and full-service home improvement contractor. They provide comprehensive remodeling, repair, and maintenance solutions for home owners. For anyone who requires their assistance in gutter repair or replacement, roof repair, or handyman services, they can help.

Hoshizaki America provides commercial ice makers including flakers, cubers, hotel/motel dispensers, counter top dispensers, ice storage bins, beverage dispensers, reach-in refrigerators, reach-in freezers, megatop sandwich prep tables, undercounter refrigerator/freezers.

HotArctic Heating And Cooling is a Nairobi-based air conditioning, cold room, mechanical Ventilation and refrigeration supplier / contractor in Kenya.

Founded on January 1, 2000, House Pro was started with a simple concept - offer unparalleled service and customized heating and cooling solutions to each and every homeowner. They offer emergency AC repair services, available 24/7, to keep residents cool when the heat is on. Trust their experienced technicians for Houston AC repair – they’ve serviced over 35,000 homes in the region.

Housecall Pro was founded in 2013, and we’ve been helping home service professionals thrive ever since. Its core SaaS software platform helps Pros with scheduling, dispatching, job management, invoicing, payment processing, marketing, and more.

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.

Howard Air focuses on providing the latest technology in superior comfort to meet all of the air conditioning and heating needs. Whether it is residential or light commercial sales, service, installation, indoor air quality or new construction, they guarantee that their specialized team will provide the best quality work.

Howden provides a comprehensive range of screw compressors for virtually any refrigeration or gas compression requirement; providing service and maintaining a large inventory of OEM parts.

HTL Aircon Pvt. Ltd. is an integrated HVAC Project Management Corporation. They are structured to offer solutions for all HVAC services. They are premium HVAC contracting company and the most preferred in fit-outs & VRV Installation category.

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.

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.

Hughes Environmental helps their customers to create safe and clean work environments by providing quality commercial duct cleaning, rafter and ceiling cleaning, and combustible dust remediation services.

Huzhou Bocheng is a modern enterprise specializing in R & D, manufacturing and sales of motor and household appliances. Products are widely used in exhaust fans, axial flow fans, hair dryers, ventilators, Hongyun fans, electric fans, purifiers, range hoods, blowers, induced draft fans, dryers, ovens, air conditioning fans, shoe polishers, Yuba, heaters, forced exhaust gas water heater, washing machine, freezer, instrument cooling fan, etc.

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.

HVAC Now California's fast, reliable, and budget-friendly heating and cooling solutions provide services, including AC repair, furnace installation, and HVAC maintenance across California, USA. Stay comfortable year-round with expert service at the doorstep!

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.

HVAC Technical Solutions Ltd are a well established, Yorkshire based HVAC contractor serving the UK. They specialize in heating, air conditioning, ventilation and BMS systems. Their primary services include design, installation, maintenance and repair of mechanical and electrical building services. They also design, supply, install and maintain a wide range of Air Conditioning equipment to suit client specifications.

HVAC Technologies is transforming the heating and air conditioning industry by educating and empowering consumers and creating new ways for consumers to connect with trustworthy local HVAC contractors.

Hydro Pump Company, based in Omaha, Nebraska, is a wholesale distributor of geothermal heat pumps, HVAC products, and water well products from the nation’s leading manufacturers, serving contractors in Iowa.

iACS have made a name for themselves in the UK as Air Handling Control Experts - the software team work relentlessly in ensuring that the AHU control solution remains ahead of the curve while the in-house panel build team work to the highest standard in order to achieve quickest turnaround in the Industry.

Ace Instruments’ IAQ Detectors range empowers the new generation of sustainable buildings to continuously monitor indoor air quality with cutting edge instrumentation. Positive performance on major indoor air quality parameters has been linked to improved productivity, reduced operating cost and carbon footprints. Their extensive experience of over 30 years in manufacturing enables them to deliver customized solutions for unique IAQ applications.

IAQmatters is a joint initiative of heating, ventilation and air conditioning (HVAC) manufacturers in Europe and the Middle East, which provides solutions to ensure a healthy indoor climate.