One Source, Inc. provides complete building management services for commercial properties throughout San Diego. they work with clients in a wide variety of industries to coordinate services in every area of maintenance, from janitorial services to landscaping, high-pressure washing, carpet cleaning, window washing, junk removal, and much more.

ONICON Incorporated has been delivering market leading flow and energy measurement products since 1987. Their inventory includes hydronic insertion turbine flow meters, hydronic inline turbine flow meters, BTU meters, flow computers, vortex flow meters, electromagnetic flow meters. They have been delivering quality engineered flow and energy measurement instruments for hydronic heating and cooling systems for over 30 years.

Oozzio offers an one-stop-shop for HVAC supplies! Whether for appliance repair, HVAC business, or a DIY enthusiast, Oozzio has everyone covered. Discover top brands, heating, cooling systems, furnaces, mini splits, air conditioners & accessories at their stores. Their user-friendly website and powerful search tools are the most trusted source for residential & commercial HVAC 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.

Osborn HVAC is a full service Sugar Land AC Company servicing both residential and commercial Air Conditioning, Heating and Refrigeration equipment. OSBORN HVAC has provided quality AC Repair, HVAC maintenance and AC installation throughout the Houston and surrounding area since 2009. Located in Sugar Land, Tx, they continue to service a growing community of satisfied customers who depend upon us for quality service.

Ouellet is the manufacturer of heating and ventilation equipment for institutional, commercial, industrial and residential applications; electric heating equipment to include unit heaters, ceiling heaters, cabinet heaters, baseboard, bath ventilation, Heating Cable, Self-Regulating Cable etc.

Owen AC Services specialize in providing HVAC services, as well as air quality services. They work with air conditioners, providing installations, repairs, and maintenance, as well as heaters. They work with folks throughout Houston and the surrounding area, and they strive to ensure that home is comfortable, and its air remains fresh and healthy.

Owens Companies brings over six decades of experience to each building they service. They are the leading fully integrated, single-source mechanical contractor in the Twin Cities. Twenty-four hours per day, seven days per week, Owens is here for home or business.

Owens Corning develops, manufactures, and markets insulation, roofing, and fiberglass composites.

Oxygen8 is changing the way buildings provide healthy, comfortable and energy efficient spaces for occupants. They provide 100% fresh, filtered air and smart technology for maximum comfort and value.

Pace Heating and Air - Albany service all makes and models of furnaces and air conditioners. And they proudly offer the full line of Carrier heating and cooling equipment, as well as hearth products from HEAT-N-GLO.

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.

Pacifica Home Services Ltd. provide a wide range of HVAC and home improvement services in the region of Houghton Le Spring, in Sunderland, in the United Kingdom.

Pack HVAC services has been customer's solution for heating and cooling issues in the Baton Rouge area for over 15 years! Their licensed and bonded team repairs, installs, and services all major brands of HVAC systems including heat pumps, furnaces, air conditioners, thermostats, air handlers, and high efficiency units.

Packerland Heating & Cooling provides heating and cooling services and is based out of the USA.

Pacor, Inc. is a major US-based fabricator and distributor of thermal and acoustical insulation products. They provide fabricated and roll goods insulation: fiberglass, aerogels, foam, ceramics and gasketing for OEM manufacturers and other industral applications.

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

When it comes to heating & cooling for home or office, Palatine Unique Indoor Comfort provides expert HVAC installation & repair services in Palatine & nearby areas of the US state of Illinois.

Pallardy Heating & Air Conditioning is dedicated to providing the best possible solution for home or business. One can count on them to provide you with a system and solution that fits one's unique needs.

Panasonic is the premier manufacturer of powerful, energy-efficient ventilation fans and indoor air quality solutions. We produce the highest quality, code compliant solutions available in the market today.

Paradise provides heating and cooling solutions and is based out of the USA.

Parker Heating & Cooling is a family-owned and operated heating and cooling company. Their heating and cooling technicians are experienced educated technicians and installers.

Parthenon Plumbing is Middle Tennessee’s premier, full-service plumbing company. Headquartered in Nashville, TN, they specialize in commercial and residential plumbing.

PHIUS (Passive House Institute US, Inc.) is an organization committed to making high-performance passive building the mainstream market standard. PHIUS+ buildings provide superior indoor air quality, resilience during power outages, and an extremely quiet, comfortable indoor environment.

Patriot, as a family that lives and works in this community, they believe in supporting it. This is why their AC company is driven by customer service and dedicated to the quality treatment of their customers.

Nine years ago, Jake Kenefake had a vision of bringing personalized touch HVAC services. Since its inception, Patriot Heating and AC have done just that. They involve their customers in every step of the process with transparency and expert advice so that they may be fully informed and comfortable in making HVAC decisions.

Patriot Heating and AC are proud to be industry leaders. The certified master technicians are in the top 1% of all technicians in the entire metro area. They are members of the Better Business Bureau and have achieved an A rating with them. Angie’s List has given us an A+ rating and awarded us the Super Service Award for 7 years in a row.

The world comes to Patterson for enhancing safety and comfort in HVAC and fire suppression technology, for meeting pumping demands in water supply, irrigation, flood prevention and wastewater treatment and for industrial solutions to liquid transfer and process heating or cooling needs.

Patterson-Kelley serves the commercial heating industry with the most respected products in the field. They provide Commercial Boilers, Commercial Water Heaters, Fabricated Systems, Commercial Solutions, Heating Solutions, Engineeering Solutions and much more.

Paul Shadid Heating and Air Conditioning has been providing service and installation of HVAC (heating, ventilation, and air conditioning) systems.