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.

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.

The Heat Pump Association (HPA) is the UK’s based authority on the use and benefits of heat pump technology and includes many of the country’s manufacturers of heat pumps, components, and associated equipment.

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.

Heating and Hotwater Industry Council (HHIC) has been established for driving, supporting and promoting the sustained growth of the UK domestic heating and hot water industry.

Heating Force has experience on both sides of the heating industry, and that’s enabled them to build one of the biggest free resources in the UK – helping over 60,000-150,000 visitors with boiler problems every-single-month. They also connect homeowners with cheap boiler installers, such as HEATABLE or WarmZilla.

Hemco Inc. is a HVACR organization which provides application engineering and technical expertise for any project with primary focus on the commercial refrigeration sector. Difficult or unusual projects are their specialty.

Hertel is a pioneering international, multi-disciplinary, industrial services company. It supports its customers with Access Solutions, Insulation, Corrosion Protection, Mechanical, offshore Living Quarters, and Specialist Services. Hertel is working for customers in the Oil and Gas, Process, Energy, and Offshore industries.

As a non-profit organization, HETAS pride itself on investing surplus funds into business areas that directly contribute to safely reducing particulate and carbon emissions for the benefit of the people and the environment.

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

HBI (Home Builders Institute) is a national nonprofit that provides training, curriculum development, and job placement services for the building industry. With job placement rates at over 80 percent for graduates, HBI training programs are taught in local communities across the country to at-risk youth, veterans, transitioning military members, justice-involved youth and adults, and displaced workers.

Home Connectivity Alliance (HCA) is an appliance, HVAC, and TV manufacturers alliance that is focused on IoT and connectivity in the new digital landscape.

The Home Ventilating Institute (HVI), is a nonprofit association of manufacturers of residential ventilation products. HVI provides creditable product performance ratings including airflow, sound and energy.

The purpose of the Sustainable Energy and Environment Coalition is to advance policies that promote clean energy innovation and domestic manufacturing, develop renewable energy resources, and create family-sustaining clean jobs throughout the product supply chain.

HSB Living Lab is a Swedish technology cooperative founded in 1923 that organizes 554, 000 members. HSB living lab is made up of 4-modules houses. The modules make it possible to rebuild and move the building, which makes the lab easy to access for researchers, developers and innovators.

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.

HVAC Excellence was established in 1994 to improve the technical competency of the HVACR industry through validation of the technical education process. They provide student outcome assessments, technician certifications, educator credentialing, programmatic accreditation and professional development.

HVACi is the nation’s leading provider of residential and commercial HVAC and refrigeration damage assessments for insurance carriers. Its prompt inspections and actionable reports help insurance adjusters settle HVAC claims more quickly and with a higher degree of accuracy.

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

hybridGEOTABS EU is an active group of developers, engineers & academics with a common interest in optimizing coupled geothermal heat pumps (GEO-HP) and thermally activated building systems (TABS), alongside secondary heating & cooling systems. TABS use pipes, embedded in concrete floors, ceilings and walls, through which warm/cold water is pumped to heat/cool a building’s thermal mass.

The International Association of Plumbing and Mechanical Officials has been protecting the public’s health and safety for ninety three years by working in concert with government and industry to implement comprehensive plumbing and mechanical systems around the world. They're recognized for Uniform Codes and offers plumbing, mechanical, solar energy, swimming pool and hydronic code convenience.

IAPMO EGS mark is a valuable asset that assist in promoting products by communicating concern for customers. IAPMO EGS is recognized for technical excellence in testing certifying electrical, pool and spa, fuel gas and solar products that meet the highest standards of public health, safety and environmental quality offer independent testing, certification and listing for mechanical pool, spa and bathtub industries.

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.

IFC Certification Ltd is a UKAS accredited and internationally recognized provider of high quality customer focused independent third party certification. IFC Certification Ltd is also a Notified Certification Body for certificating products for CE Marking under the Construction Products Directive.

IFEMA MADRID is where growth is promoted, business is inspired and opportunities are transformed through intelligence, ingenuity, and creativity. More than 4 million people experience it each year.

ISKID is an air conditioning and refrigeration association, which has emerged in the 1950s in Turkey. İSKİD was established in 1992 with the contributions of prominent companies in the sector, to conduct work towards achieving sustainable and regulated HVAC&R Industry development in compliance with the world.

The Independent Contractors Exchange (ICE) is a select group of independent HVAC contractors specializing in the service and installation of applied HVAC systems.

IAQA is dedicated to bringing practitioners together to prevent and solve indoor environmental problems for the benefit of consumers and the public.

Industrial and Commercial Heating Equipment Association (ICOM) is the UK's trade association representing the industrial and commercial heating equipment industry sector. Together with the members, ICOM represents the industry's interests at UK Government and European levels. ICOM is a division of the Energy and Utilities Alliance (EUA).

Manufacturers of commercial kitchen equipment and domestic heating and cooking appliances are organized in HKI industrial association of House, Heating and Kitchen Technology. Both manufacturer groups are organized in separate associations which are subdivided into device-specific departments.