The modular water chiller was invented by Multistack. It started with a radically simple idea: water chillers made up of modules that could be brought into the equipment room one at a time, through standard doorways and down elevators, to form a fully integrated water chiller system. The modular chiller idea launched a revolution and transformed Multistack into a leader in the commercial water-chiller industry.

NIBCO INC. is a worldwide provider of flow control solutions for commercial, industrial, and institutional construction as well as residential and fire protection markets.

With more than 70 years of experience, Novenco Marine & Offshore is one of the largest high-quality heating, ventilation, air-conditioning and refrigeration system suppliers to the marine and offshore industry.

Nu-Calgon markets and distributes a complete line of specialty chemical products for the HVACR aftermarket. They provide water treatment, sealants, specialty and service chemicals, coil cleaners, system flush solvents, refrigeration oil, vacuum pump oil, ice machine treatment, indoor air quality.

Nu-Mun Contracting is a Calgary based plumbing company formed by Doug Muncaster in 1989. They provide sheet metal installations for commercial, industrial and residential applications. The company also offers air conditioning, residential plumbing, commercial plumbing, and other HVAC solutions.

nVent RAYCHEM is a provider of heat-trace management systems for infrastructure, industrial, commercial and residential buildings, with operations globally. They help customers enhance productivity and reduce their costs by simplifying installation and minimize downtime during operation.

Ohio Heating and Refrigeration (OHR) provides commercial and residential HVAC, boilers, building automation, commercial refrigeration, fabrication, and food service equipment.

For more than half a century, OJ Electronics have been designing and developing electronic controls for electric underfloor heating and HVAC Controls & Drives. They give access to deep application knowledge and innovative power and help differentiate themselves in the market. They are here to help build their customers’ business.

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

One Source Home Service, an Air Pros company, was founded on the premise of Integrity, Reliability, and putting the customers first. One Source Home Service is here to help the users with HVAC, ductwork, plumbing, electrical, and home energy needs in the Colorado Springs and Pueblo, CO areas.

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.

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.

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.

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.

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.

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.

PCE Instruments are the manufacturer and supplier of test devices, control systems, lab equipment, scales and balances. They have headquarters in Germany and sales offices around the world, including UK and US.

Peak Heating & Cooling Inc. specializes in the repair and replacement of the heating and cooling systems for the home or business. Peak Heating & Cooling Inc. will send only the best technician to fix the plumbing problem, air conditioner repair and, gas or propane (LP) furnace and heater repair as well as the air conditioner installation, furnace, boiler replacement, and tankless hot water heaters installation.

Pennco's hydronic heating products, designed for residential and commercial buildings, have earned a reputation for exceptional value, high performance and dependability. Built with high quality components and standards, Pennco gas and oil-fired boilers are manufactured by the company's dedicated workforce in the U.S.A. to ensure that customers get the very best in home heating comfort.

Pentair is a globally renowned provider of energy efficient water treatment systems, filtration products, pumps and water systems for residential, industrial, agriculture and commercial applications. They also offer a wide range of filters, valves, venting systems, heating and cooling solutions, industrial filtration and fire suppression systems.

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.

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.

Pinder Cooling & Heating was born to deliver unrivaled customer service combined with expert engineering knowledge and the highest quality products in air conditioning and cooling systems.

Plumhouse manufactures central heating chemicals, radiator controls, fire valves, pumps, central heating controls, thermostats, motorized valves and more.

Polyguard Products specializes in products that protect surfaces and structures from moisture, water and other undesired substances. Polyguard is currently operating under three "core" divisions with a number of growing divisions under the Polyguard umbrella. They provide Waterproofing, vapor barrier membranes for insulated ducts and piping. Exterior UV rated. Also a patented corrosion treatment system to eliminate corrosion under insulation.

Polypipe Building Products is the UK’s manufacturer of plastic piping systems and low-carbon heating solutions for the residential market. They design, develop, and manufacture over 20,000 product lines which are stocked in plumbers and builders’ merchants nationally.