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.

Pacific NW Reps, LLC is a progressive manufacturers representative firm in the Pacific Northwest representing HVACR manufacturers in Alaska, Arizona, Idaho, Montana, Nevada, New Mexico, Oregon, Washington, Utah & Western Canada.

Palatine Heating & Cooling Company offers quality service in Palatine and the surrounding suburbs. They provide installation, repairs and maintenance services.

Peck & Weis provides the best full service HVAC, plumbing, and electrical contractor services to customers. Their award-winning team offers the highest quality products and service to ensure customers home or business runs smoothly and safely.

Representing quality manufacturers, Pepco has 20 reps and sales offices in Dallas, Austin, Houston, El Paso and Tulsa to service our customer base in Texas, Oklahoma, New Mexico, Arkansas, and Louisiana.

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.

Peterman is a family-owned residential heating, cooling & plumbing company with offices in Indianapolis, Columbus, Muncie, Bloomington, and Lafayette, Indiana. It specializes in heating & cooling repair & installation, along with plumbing services, drains & sewers.

Philco provides heating and cooling products for residential and light commercial industries. They provide Air conditioners, gas furnaces, heat pumps, air handlers, air cleaners.

Phillips Heating and Cooling Services is a family-owned and operated local business that specializes in residential and light commercial HVAC systems repair, maintenance, replacement, custom sheet metal, and new construction.

Pickrel Brothers is one of the Midwest's providers of pipe, valves, fittings, plumbing, heating and industrial supplies. They also provide boilers and hydronic equipment, heating and cooling coils, unit heaters, water softners, plumbing fixtures and much more.

Port-A-Cool units are portable, evaporative cooling systems used when standard air-conditioning may be unavailable, impractical or cost prohibitive. Units operate on 115v and water. Port-A-Cool, LLC, also manufactures Kuul Pads media for all evaporative cooling systems and portable evaporative cooling units.

Precision Heating & Air Conditioning distributes air conditioners, boilers, ductless systems, evaporator coils, fan coils, gas furnaces, geothermal heat pumps, heat pumps, oil furnaces and more.

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.

Since 2019, ProThermal Heating and Cooling has served as the trusted HVAC contractor in Tulsa, OK, and nearby areas. Each technician on their team maintains certification and professional licenses. They consistently go above and beyond customer expectations, and they stand behind their work.

Quality Heating & Air is an expert in HVAC services. They offer retro install estimate, air conditioning repair, heating and cooling services, or emergency heating and cooling repair. With over 15 years of knowledge and experience in the heating & cooling industry, they have all HVAC service needs covered. They are family-owned and operated HVAC contractor dedicated to providing comprehensive heating and cooling solutions.

RCI Westech is a manufacturer’s representative agency that serves in the HVAC/R industry. For the past 52 years they have represented HVAC/R related products by promoting and training to contractors, school districts and trade schools with the partnership of our wholesaler distribution channels and industry associations. They do continuous promoting through mobile training, tradeshows, wholesaler open houses, counter days and contractor calls.

Reedy Industries is a rapidly growing commercial HVAC and building controls company that is transforming the industry. Founded in 1930, we’ve grown by providing exceptional service and unprecedented opportunities for HVAC company owners, their employees, and customers.

Refricenter International is a wholesaler/exporter of heating, ventilation and air conditioning parts, supplies and equipment.

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.

Regal Inc. offers a full range of heating and cooling services with their nationally trained technicians for ones home and business. Their product range includes gas furnaces, oil furnaces, boilers, radiant floor heating, heat pumps, geothermal systems, hybrid heat systems, roof-top units, electric heating, zone control, air purification, system balance, freon leak detection, ventilation, humidifiers, to name a few.

Regin HVAC Products Inc. are manufacturers of leak detectors, draft gauges, damper hardware, humidistats, expansion joints, air leakage testers, relay testers, leak test tools, hygrometers, and voltmeters.

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.

Resideo Technologies Inc. is dedicated to providing its customers with integrated, simple solutions, ensuring homeowners safety, productivity and comfort in their homes.

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.

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.

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.

Robertshaw has been creating and implementing innovative solutions throughout its history. Robertshaw continues to develop ground-breaking solutions that make products more effective, more efficient, and more attainable. They specialize in air conditioning, cooking. dishwashing, refrigeration, heating products.

RMIS is a representative of Heating, Ventilation and Air Conditioning products in the Intermountain West. They also offer product training at our location including HVAC Training, plumbing certifications catered to both mechanical contractors and wholesaler personnel.

ROTRONIC is a manufacturer of humidity, temperature control instrumentation and CO2 for HVAC and semiconductor applications.