The National Institute of Standards and Technology (NIST) was founded in 1901 and is now part of the U.S. Department of Commerce. NIST measurements support the smallest of technologies to the largest and most complex of human-made creations, ranging from nano-scale devices so tiny that tens of thousands can fit on the end of a single human hair up to earthquake-resistant skyscrapers and global communication networks.

National Pump Company manufactures a complete line of vertical lineshaft turbine, submersible, and booster pumps for the agricultural, municipal, petroleum, and industrial-commercial markets. They are a major fluid pumping solutions provider in the global water and energy markets through collaboration and innovation.

NJR Home Services is a trusted HVAC company dedicated to providing top-notch home comfort solutions. Specializing in furnace installation, air conditioning installation, and water heater installation, they cater to various heating and cooling needs. They offer customers home comfort solutions, including equipment sales and installations; lease and purchase of solar; and Comfort Service Plans, including heating, cooling, water heating.

Olimpia Splendid is an Italian company globally known for its design, production and marketing of products for Air Conditioning, Heating, and Air Treatment solutions.

ONDA S.p.A. is manufacturing company of advanced heat exchangers for refrigeration, heating and air conditioning equipment.

OpenTherm is a non-manufacturer-dependent system of communication between modulating HVAC appliances and room thermostats. It consists of a communication protocol and an interface specification. The OpenTherm communication protocol is primarily designed to control modulating heating appliances. The protocol is available to members of the OpenTherm Association only.

Perfect Temp Heating and Cooling is one of the best HVAC contractors in Minneapolis, MN, USA. At Perfect Temp, their commitment is to provide customers with the best possible service experience goes beyond just honoring a warranty or showing up when called upon.

Plumbing Medic is ready to help with any type of heating and air conditioning job in Gilbert. They’re also able to offer comprehensive plumbing services throughout Maricopa County.

PM IMPIANTI was founded with the aim of building and installing pre-insulated aluminum, galvanized sheet or stainless steel ducts: experience and professionalism at the customer's service. Over time, they have also specialized in the design, installation and maintenance of split, mini-split and air conditioning systems

Prévoté provides globally renowned transport and logistics services, including transport, vehicle rental, logistics and courier solution in Paris, France.

Prime Time Boilers are an Essex based company who specialize in a rated energy efficient boiler installation and replacements. Their mission is to supply the customers with the most modern, technically advanced and energy efficient heating systems on the market complete with the longest warranties available.

As Temecula Valley’s most dependable and professional HVAC contractor, ProFlo Air Conditioning, Heating & Plumbing strive to keep their reputation in tact. They hold themselves and their work to the highest standard. Their technicians are constantly improving their skill set by frequently completing required training by their heating and air conditioning appliance suppliers.

Propous is one of the largest independent suppliers of gas and oil burner’s spare parts, valves, air heaters, and HVAC products. The success of the company can be attributed to its efficiency, reliability, technical knowledge and an understanding of the customer’s requirements.

Radialight provides HVAC solutions like heating and air conditioning and is based out of Italy.

The RPA is an international trade association comprised of individuals and companies dedicated to increasing the use of radiant heating and cooling technologies through education and the development of codes and standards language reflecting best practices. RPA manufacturing members produce the tubing, valves, heat sources, emitters and controls used in radiant floors. RPA engineers and architects design high efficiency radiant hydronic systems.

Redwood Services' mission is to support its local partners with shared resources, access to capital and best-in class operating systems and processes – all designed to drive long-term, profitable growth. Founded in 2020, with the backing of the Union Main Group, Redwood Services is actively investing in ‘mission critical’ home services companies, including HVAC, plumbing, and electrical.

REFCOM is the UK's market F-GAS certification scheme, operating since 2009. They help companies make sure that they comply with F gas regulations since 2014.

REHVA is The Federation of European Heating, Ventilation and Air Conditioning associations founded in 1963. REHVA's mission is to develop and disseminate economical, energy efficient, safe and healthy technology for mechanical services of building; to serve its members and the field of building engineering (heating, ventilation and air conditioning) by facilitating knowledge exchange.

Renew East Ltd was born with the aim of having a positive effect on the environment and making sustainability accessible to all. It aims to simplify the process of installing an air source heat pump in the home while providing exceptional and innovative service to customers.

Renewable Equipment Solutions (RES) specializes in the design and supply of bespoke renewable equipment for domestic and commercial premises across the United Kingdom (UK). They offer industry-renowned equipment, comprehensive system designs, and expert technical support. They are a MCS accredited, HEIS consumer code member, TrustMark registered and NICEIC approved company.

Richmonds Plumbing & Heating Merchants Ltd have extensive experience in the plumbing and heating trade to provide excellent customer service. Its many loyal and long-standing customers are a testament to its success in ensuring that it consistently adheres to be a guiding principal.

Rightio are a nationally recognized home maintenance company committed to doing things right. They have a trusted network of highly qualified engineers across the UK that complete over 10,000 repair and service jobs ever month.

Robert Heath Heating provides domestic heating service, maintenance, and installation for private clients and social landlords. Competitive service for both residential and commercial gas services.

Roen Est is a renowned solutions provider for the design and production of heat exchangers. Established in 1983, as a manufacturer of finned pack heat exchangers, the company is considered a reference point for its technology and broad array of solutions for air conditioning, refrigeration, heating, and cogeneration.

Salix Finance supports decarbonization and energy efficiency in the public sector by providing funding, support and expertise.

Savage & Sons (Electrical) Ltd is a family owned company and was formed in 1980, the company has continually grown since then and specializes in many types of electrical installations. They offer a wide range of electrical installation services to a wide ranging client base. Over the years, the company has grown and updated to provide the very best in modern services to the industry.

At ScottishPower, they’re working on a better, greener future. They only generate renewable electricity and they’re proud that all their domestic green tariffs are backed by 100% green electricity, made by their windfarms right here in the UK.

SenerTec GmbH, based in Schweinfurt, has been producing and selling the badger (Power plant for heat and electricity) since 1996. The company works on the principle of cogeneration and generates heat and electricity at the same time, because it uses the fuel (natural gas, liquid gas) used extremely efficiently.

Senseware is a Vienna, Virginia-based Smart Building Solutions company offering an affordable facility monitoring and controls platform for the commercial and industrial building market. What began as a way to simply stream real-time energy data has blossomed into a full blown universally connected Internet of Thing ecosystem capable of connecting any device, system, or piece of equipment.

Service Experts Heating & Air Conditioning (Service Experts) sells, services, and repairs more heating and air conditioning systems than any other HVAC service company in North America, and all are backed by their written 100% Satisfaction Guarantee. Service Experts has over 100 service locations in cities across the North America, providing heating repair, air conditioning repair, and indoor air quality sales, HVAC installation and repairs.