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.

Ranger Pumps is a privately held corporation that was founded in 1989 in Memphis, Tennessee. Ranger has become a domestic and international pump supplier. They pride themselves on manufacturing pumps in the USA from parts made in the USA.

RATH has specialized in base materials and finished products for the refractory sector. Individual design and the highest quality of the products - that's what their customers appreciate.

Rathe Associates offers services like applications, provide technical backup, and field support int he HVAC industry and deals with Commercial Boilers & Water Heaters, Hydronic Heating Accessories & Controls, Radiant Heating & Snow Melting, Commercial Radiation, Pumps & Circulators and Steam Specialties & Controls.

RB HVAC Inc. is a trusted provider of residential and commercial heating and air conditioning services across California. Their certified technicians specialize in fast, reliable HVAC repairs, energy-efficient system installations, and comprehensive maintenance programs designed to keep the home or business comfortable all year long.

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.

Refra is a well-known manufacturer of refrigeration and air conditioning equipment in Europe. Distinguished by a highly complex and unique offer of refrigeration products, the company can design and manufacture non-standard products, fully customized and completed according to customer requirements. Refra has firmly established itself in the European refrigeration market.

Refrigeration Wholesale provides one stop shop for all HVAC and Commercial Refrigeration parts and Equipment. They carry a large variety of air filters including specialty filters like Air Bear.

With over 75 years of experience and 18 branches spanning across Western Canada, Refrigerative Supply Limited is now one of the country’s leading distributors of residential and commercial HVAC and refrigeration equipment, parts and tools. RSL continues to invest in providing its customers with fast, personable, and reliable service both in-store and online.

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.

Rite manufactures and provides Low and High Pressure Steam Boilers, Hot Water Boilers, Blow down Tanks, Boiler Feed System, Water Softeners, Chemical Feed Systems, and more.

RK Mechanical Air Services prides itself on being the trusted HVAC partner for residential and commercial clients across Placer, Sacramento, Yolo, Napa, Sonoma, and Marin counties. Since 2019, after partnering with FA & AO, their locally owned business has grown and now operates broadly in Northern California, delivering top-tier heating, cooling, air conditioning, ventilation, furnace repair, air quality solutions, and HVAC maintenance.

Robert A. Nowak HVAC understands the importance of a comfortable and well-regulated indoor environment. As the premier Buffalo-area HVAC service provider, they bring decades of experience, unwavering expertise, and a commitment to excellence that sets them apart. They proudly offer both residential and commercial HVAC solutions.

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.

Robertshaw Climate is an industry pioneer in HVAC line voltage, low voltage mechanical, digital, and communicating thermostats for the residential and light commercial marketplaces.

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.

Romaniuk Heating and Air Conditioning is a locally owned and family-operated business. After 30 successful years, it understands that delivering a high-quality product with superior customer service is the only way to reach goals and continue to grow within this highly competitive industry.

Royal Aire, Lic provides solutions like Air conditioning, Heating, Solar, Insulation, Water Heating, etc and is based out of USA.

RST Thermal is a Manufacturer's Representative, serving New England, for multiple manufacturers whose products offer a systems approach to comfortable heating and cooling. They provide technical and sales support to their wholesale distributor partners and contractors. For homeowners, they provide geographic lists of installing and servicing contractors to help them find the "best fit" for the project to be done.

RYCOR HVAC is a family-owned and operated business, exclusively specialized in single and multizone ductless heat pump installations.

Sales ​​Engineers Inc. is a manufacturers' representative selling to the heating, plumbing and specialty refrigeration markets. Their emphasis is on distributor oriented business with a contractor/dealer focus. They represent the following manufacturers: Purolator, Broan-Nutone, Gastite, Nortek Global HVAC, First Company, Lenox, Hilmor, Shurtape, and Thermaflex.

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

Samm's Heating and Air Conditioning was founded on the five fundamental principles of honesty, professionalism, punctuality, cleanliness, and superior customer service.