Manufacturers of air distribution, includes underfloor products, air control includes industrial dampers, VAV air terminal units, fan coil units, silencers, duct heaters, and air handlers.

Napco-International manufactures and supplies high quality industrial grade heating elements and supporting components to the industrial markets. They provide electric heating elements and accessory products such as HVAC heating elements for electric furnaces, heat pumps, air handlers and many more.

Nelumbo is commercializing a new platform of structural materials. The company’s current focus is on developing improved heat exchangers for the HVAC market.

NexCore is a commercial heating, ventilation, and air conditioning (HVAC) system services provider focused on maintenance, repair, and replacement work for its clients. In addition to its core HVAC capabilities, the company offers electrical, plumbing, construction, and building automation services, providing customers with a single-source solution for facility maintenance and repair needs.

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

Nor-Cal Products has manufactured the highest quality vacuum chambers, components and engineered subsystems used in semiconductor, flat panel display, industrial coating, LED lighting, energy and research equipment.

As a manufacturer of duct products for environmental filtration systems, Nordfab Ducting are proud to help supply clean air for workers and equipment in workplaces of all sizes and types. Their ducting is an integral part of dust, mist, and fume collection systems around the world.

Noritz offers a full line of tankless water heaters and high efficiency combination boilers to meet the hot water demands of residential and commercial applications. Noritz supports its products with a national network of skilled representatives and employees who are committed to providing the finest products and services to its communities by helping consumers.

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.

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.

Overly Hautz Motor Base manufactures and designs the world's most complete line of motor mounting products. They also provide Adjustable motor bases, conversion bases, pivoting and automatic motor bases.

PJ Dionne Company serves the commercial plumbing and HVAC needs of public and private organizations across the greater Boston area. For a quarter century, the company's plumbers and pipe fitters have installed and maintained mechanical systems in new and historic buildings, working closely with the area’s leading general contractors, engineers, and building owners.

Packless Industries is a manufacturer of heat transfer and other metal hose products. They provide metal hose assemblies; vibration absorbers; refrigerant heat exchangers; co-axial condensers, evaporators (chillers) and heat pump coils; desuperheaters/heat reclaimers.

Parker Hannifin Corp. provides system protectors, valves and controls for industrial, supermarket, appliance, commercial, residential and mobile air conditioning and refrigeration applications. They provide Signature brands include Sporlan, R/S, HERL, Micro Thermo Technologies.

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.

Pottorff delivers quality HVAC products at competitive prices. They provide Smoke dampers, fire dampers, combo fire/smoke dampers, louvers, control dampers, access doors, ceiling dampers, motors and actuators and much more.

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.

PTubes, Inc. is the US subsidiary of Feinroren S.p.A. -- Italy. They are a manufacturer of copper refrigeration coils, pipe and pre-insulated copper coils for the HVAC industry.

R & Y A/C Compressor is the leader in A/C Auto Parts, providing quality car air conditioning parts & services. They manufacture & distribute variety of replacement mobile climate control products like compressors, driers/accumulators, evaporators, condensers and more.

Rack Engineering Division specializes in manufacturing storage and material handling products specifically designed for high weight capacities and heavy use. Rack Engineering understands that professional storage solutions are an integral element for efficiency and organization in the workplace, and they're proud to provide the highest quality products to the distributors and customers.

Rahn Industries manufactures a full range of fin and tube heat exchangers including chilled and hot water coils, glycol coils, booster / reheat coils, evaporator coils, condenser, steam and other exact fit OE, custom and severe duty coils that are guaranteed to fit and perform. Rahn Industries is AHRI certified; UL listed and have ETL certification for fan coils.

Rapid Recovery provides refrigerant recovery services for the HVAC, refrigeration, demolition, and marine industries. Projects range in size from single residential split systems to chilling systems operating on tens of thousands of pounds, to projects with thousands of units.

RCD Corporation Mastics are air duct sealants that save energy by sealing leaking air conditioning, heating, and HVAC air ducts in forced air heating and cooling systems.

Reclamation Technologies is the Midwest pioneer EPA certified refrigerant reclamation company. They offer a wide range of services to assist their customers with refrigerant management issues.

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

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.

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.

Royce Industrial Compressor provides Industrial hermetic, semi-hermetic, open drive compressors and compressor units from 1 to 150 h.p.