The Refrigerating Engineers and Technicians Association (RETA) exists to enhance the professional development of industrial refrigeration operating and technical engineers through education and certification.

Refrigeration Design Technologies (RDT) designs and manufactures refrigeration systems for food service operations. RDT has equipment in many restaurants, hotels, casinos, universities, hospitals, prisons, corporate dining facilities, sporting stadiums and theme parks.

Refrigeration Equipment Specialist is a manufacturer's representative warehousing and technical sales of refrigeration for low, medium temperature applications - Freon, Ammonia, CO2 -to refrigeration contractors.

Refrigeration Research Inc. are manufacturers of high-quality commercial/industrial refrigeration and air conditioning components. Refrigeration Research uses hydrogen brazing to assemble tanks, which ensures a clean, contaminant-free process – helping to avoid problems. They also provide personal, accessible service.

Refrigeration Technologies is the manufacturer of specialty chemicals, product research, development and marketing in the HVAC 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.

RefTec International manufactures and supplies the heating, ventilating, and air conditioning industry with standard and customized refrigerant recovery, purge, and chiller pressurizing equipment. These units, among others, are used as service tools in the HVACR industry.

REFTECO offers a wide range of tailor made chillers suitable for industrial refrigeration, commercial refrigeration and process cooling (oil & gas industry, ice rinks, etc.). The product lines are available for indoor or outdoor installations and for ammonia or HFC refrigerants. All product ranges are designed to provide low energy consumption, reduced refrigerant charge and low maintenance cost.

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.

Reliable Architectural Products is a pioneer in louvers, hurricane impact louvers for PTAC applications, penthouses, screens, brick and block vents, dampers and sunshades.

Reliable Heating & Air has been serving all of Metro Atlanta's communities offering heating, cooling, plumbing, and electrical services, indoor air quality, duct cleaning, insulation, and home and building performance for both residential and commercial customers.

RWC and its family of brands develop safe, sustainable, and efficient solutions to help shape a better world. We engineer and innovate products to integrate seamlessly within the modern built environment. RWC and its family of brands transform performance and efficiency for plumbing and heating, smart homes, and specialist industries around the world.

Renroc Group was established in 1991 to revolutionize and optimize Australian Industry. The company began by supplying pumps and fluid handling systems to many industries. The company is now a diversified specialty equipment and services supplier including pumps and polymeric coatings. Serving, Oil & Gas, Power, Renewables, Water & Waste Water, Food & Beverage, Chemical, and HVAC markets.

Rensair is a specialist in air purification, protecting, and enhancing lives through clean air. Its patented technology combines H13 HEPA filtration with germicidal UVC light, was developed to meet the strict standards of Scandinavian hospitals, and is independently validated by scientific research laboratories. Rensair air purification units meet all the standards recommended by the US EPA and UK SAGE committee in their respective reports.

Resolute is a well-capitalized, deeply experienced company focused on growth by providing service to a wide spectrum of customers in the HVAC industry. They provide Rental Chillers, Compressors, RSR's, HVAC, HVACR, Rental Heat, Rental Power, Rental AC, Rental Dehumidification, Rental Fans, Rental Air Handlers, Rental Cooling Towers, Rental Generators and much more.

Resource Data Managemen offers a range of over 500 hardware and software products for heating, ventilation, air conditioning, refrigeration, building and energy control applications

Even today, the original 561 Rogers Road facility is still part of the Reversomatic family. The company has grown significantly over the years. Reversomatic now boasts 5 facilities across the Toronto region, including a plant in Brampton, Ontario. In addition, Reversomatic also has a facility in Sarasota, Florida to service the US market. Starting from a single fan in 1972, proudly feature an extensive product line of fans and accessories.

REYMSA Cooling Towers has been in the cooling tower business for 50 years and offers the best Non-Corrosive Cooling Tower on the market. All of our towers are CTI Thermal Performance certified.

When its cold outside, Reznor brings the heat. For more than 90 years, they’ve delivered reliable, high-efficiency unit heaters to their customers. Their unit heaters feature attractive, high-gloss exteriors, components engineered for quality, and a complete range of options to fit any application. And, many of their high-efficiency unit heaters qualify for rebates or subsidies from local governments or utilities.

Rhodes and Stafford is a company that serves as a representative of companies like Diversitech, Southwark Metals, Berry Global, J. P. Lamborn, Uni-Weld, Hardcast, Glasfloss Industries, Honeywell Genesis Cable, Truaire, Soler&Palau, Fujitsu, JB Ind., Builder's Best, Pro1, Trion.

RIDGID provides high quality HVAC products for drain cleaning, pipe fabrication, pressing, threading and much more. RIDGID® Wet/Dry Vacs are designed and engineered for best-in-class power, performance and durability. RIDGID shop vacuums are also backed by the best warranty in the industry.

RightTek excels in providing real-life Residential HVAC Training from entry-level classes to advanced specialized training for senior technicians. As an Army-approved Career Skills Program (CSP) provider, RightTek re-tools soldiers leaving active duty for a rewarding career in the Residential HVAC Industry.

Riley Sales is a distributor and service provider of HVAC needs. They cater to the industry by offering services for air ventilation and filtering to thermostats and sheet metal.

Ripple Energy makes clean energy ownership accessible and affordable for everyone, everywhere. Ripple will enable energy consumers around the world to part own large scale wind farms and solar parks and have the clean, low cost electricity they produce supplied to their homes. Their utility partners supply the electricity from the wind farms and solar parks to their owners’ homes via the grid.

RIS GreenChill systems are renewable energy systems which bolt onto a van, truck or trailer to run the refrigeration unit via its electric motor on sustainable and renewable power.

Ritchie Engineering Inc. offers a complete line of HVAC&R service and installation tools including recovery, vacuum pumps, hoses, test and charging manifolds, gauges, leak detection and electronic testing equipment, and service tools.

Rite Way Heating, Cooling & Plumbing is a local plumber and HVAC company, serving home and business owners across Tucson, Arizona, USA. They offer a wide range of heating, cooling, and plumbing products, including air conditioners, furnaces, heat pumps, hot water tanks, and water conditioning systems.