NATE is a nonprofit certification organization for heating, ventilation, air conditioning and refrigeration (HVACR) technicians. They provide service and installation certifications in: air conditioning, air distribution, air-to-air heat pumps, gas furnaces, oil furnaces, hydronics gas, hydronics oil, light commercial refrigeration, commercial refrigeration, ground source heat pump loop installer, and HVAC efficiency analyst.

Nathan Star Technical Services LLC (NSTS) is the best among MEP contracting companies in Dubai and HVAC companies in UAE managed by a team of highly qualified and well experienced professionals. We provide fast-track DEWA contracting, mechanical services in Dubai, air conditioning and heating services, industrial air conditioner repairing servicing as well as offer plumbing and electrical installations in UAE.

NADCA is an international association of over 1,200 companies that provide HVAC inspection, maintenance (i.e., cleaning) and restoration services. NADCA offers standards, specifications, specialized training and certification for industry professionals.

NAEIR is a national nonprofit organization that takes in donations of excess inventory and redistributes those goods to schools and nonprofit organization.

The National Board of Boiler and Pressure Vessel Inspectors was created in 1919 to promote greater safety to life and property through uniformity in the construction, installation, repair, maintenance, and inspection of pressure equipment.

National Center for Construction Education and Research (NCCER) is a not-for-profit education foundation created in 1996, as The National Center for Construction Education and Research. NCCER develops standardized construction and maintenance curriculum and assessments with portable credentials.

National Comfort Institute, Inc. (NCI) is an organization that provides heating, air conditioning, plumbing and electrical contractors with a focused offering of services and tools to help them improve their businesses, differentiate themselves, grow, and become more profitable. NCI accomplishes this through membership groups and by providing unique business management, sales, marketing and technical tools, training, support and coaching.

NCE is a supplier of new and remanufactured air conditioning and refrigeration compressors for commercial, industrial and transportation applications.

An ANSI-accredited Standards Developing Organization, the National Electrical Manufacturers Association (NEMA) gives members a competitive edge in today's rapidly changing marketplace by expanding market opportunities, acquiring exclusive business intelligence, removing market barriers, building supply chain connections, and harnessing innovation.

The National Environmental Balancing Bureau (NEBB) is the premier international association of Certified Firms that perform Building Systems Commissioning, Building Envelope Testing, Cleanroom Performance Testing, Fume Hood Testing, Retro-Commissioning and much more!

The Occupational Safety and Health Act of 1970 established NIOSH as a research agency focused on the study of worker safety and health, and empowering employers and workers to create safe and healthy workplaces. NIOSH is part of the U.S. Centers for Disease Control and Prevention, in the U.S. Department of Health and Human Services. It has the mandate to assure “every man and woman in the Nation is safe and in healthy working conditions.

The National Institute of Standards and Technology (NIST) was founded in 1901 and is now part of the U.S. Department of Commerce. NIST measurements support the smallest of technologies to the largest and most complex of human-made creations, ranging from nano-scale devices so tiny that tens of thousands can fit on the end of a single human hair up to earthquake-resistant skyscrapers and global communication networks.

National Pump Company manufactures a complete line of vertical lineshaft turbine, submersible, and booster pumps for the agricultural, municipal, petroleum, and industrial-commercial markets. They are a major fluid pumping solutions provider in the global water and energy markets through collaboration and innovation.

National Refrigeration and Air Conditioning Products Canada Corp., is a leading North American manufacturer of commercial refrigeration products marketed under the KeepRite Refrigeration brand name.

NB Heating & Air Conditioning installs, maintains and repairs residential and light commercial Heating – oil, gas, electric, boiler, and radiant Air conditioning – electric, heat pump and gas Air quality systems – filtration, UV, whole house solutions We provide services throughout Central and Northern Virginia.

As a trusted partner in HVAC, Refrigeration, and Hydronics components, NDL Industries is here to provide solutions that enhance efficiency, reliability, and sustainability for their projects. Starting out producing a more advanced ACR copper fitting, they now offer high-quality components spanning 14 different product categories.

NDL Specializes in high quality technical products at competitive prices. Copper Fittings, Press Fittings, Ball Valves, Service Valves, Press Valves, Black Iron Fittings and Nipples and more.

Neal's Heating & Air is a family-owned company that services all types of residential and commercial comfort systems. It has continued to offer custom design layouts, installation, and service of all makes and models.

NearU is a technician and customer-centric provider of residential and light commercial HVAC services. The company is well-capitalized and seeks to grow organically and by acquiring or partnering with leading HVAC contractors.

Neese-Jones Heating & Cooling is located in Alpharetta, Ga. Just 30 miles north of Atlanta. Concentrating solely on the repair, maintenance, and installation of air conditioning, heating, and also indoor air quality systems allows them to excel in the industry.

Neighborly® is the world's largest home services company with more than 30 brands and 5,500 franchises collectively serving 12 million+ customers in six countries, focused on repairing, maintaining, and enhancing homes and businesses. Through Neighborly.com and the Neighborly mobile app, Neighborly connects consumers to local service providers that meet rigorous franchisor standards across 19 service categories.

Neighbors Heating, Cooling, Plumbing, & Geothermal provides HVAC solutions, Heating & Cooling Solutions, etc, and is based out of the USA.

Trust Nelke Mechanical Heating & Cooling with any HVAC system and customers will never encounter a bunch of grouchy contractors just trying to make a buck. Their company is backed by over a decade of HVAC experience, and they’re the best at what they do. Committed to the comfort and safety of their customers, the company's mission is to provide superior, speedy, affordable, and responsive HVAC expertise.

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

Neoperl is a manufacturer of faucet aerators, check valve cartridges, insert flow regulators, faucet attachments, laminar devices, sprays and adapters.

Nespolo Mechanical takes pride in serving Albuquerque residents with dependable heating and cooling solutions that stand the test of time. As qualified ac repair contractors, their team excels in addressing any air conditioning issues users might face promptly and professionally.

Nester Heating and Air Conditioning is a full-service Heating, Ventilation, and Air Conditioning (HVAC) services contractor operating in San Diego County and neighboring areas. It provides commercial and residential heating and cooling services, which include: installation, troubleshooting, repair, maintenance, tune-ups, as well as pull-out and safe dismantling of damaged or old heating and cooling units.

NetX's mission is to deliver user-friendly HVAC solutions with powerful time and energy savings features to their institutional, commercial, and industrial customers.

New Balance A/C Inc. provides residential and commercial heating and air conditioning repair, replacement, design, and installation services.

New Berlin Heating & Air Conditioning provides solutions like heating, cooling, air quality, etc and is based out of the USA.