The Norman Economic Development Coalition is dedicated to expanding the economic base of the Norman community, enhancing the earning opportunities of area residents by retaining and expanding existing businesses and industries, as well as attracting desirable new employers that are consistent with Norman's high quality of life.

Norman S. Wright provides customers with exceptional systems knowledge to meet all project requirements. They represent HVAC manufacturers worldwide, and their product lines support the latest energy, sustainability and comfort standards.

Nortek Air Solutions offers the application expertise, technological innovation, and world-class support of the group of custom heating, ventilation, and air conditioning (HVAC) brands in North America. they extensive family of brands represents a combined total of more than 390 years of experience, five manufacturing locations, and 165 sales representative offices to help find the perfect solution for your HVAC application.

The North American Electric Reliability Corporation (NERC) is a not-for-profit international regulatory authority whose mission is to assure the reliability and security of the bulk power system in North America. NERC develops and enforces Reliability Standards; annually assesses seasonal and long‐term reliability; monitors the bulk power system through system awareness; and educates, trains, and certifies industry personnel.

North Park Innovations Group, Inc. offers a high-tech HVAC solutions and product lines that were originally part of the company Stride Tool Inc.. North Park Innovations' product line includes the iManifold and iConnect solutions, all cloud services, and industrial training units.

North Shore Heating & Cooling, is an Illinois (IL) Heating, Cooling, Air Conditioning, Water Heater, Boiler, and Furnace repair, service, replacement and maintenance company, located in Glenview area. North Shore Heating & Cooling employs only the best technician for air conditioner repair, furnace repair, and water heater repair as well as all air conditioner replacement, furnace replacement, and boiler replacements.

Established in 1927, North Town Home Services provide expert appliance repair service, as well as repair and replacement services. From their highly skilled technicians to their professional sales and support staff, it is their hope that you will be absolutely satisfied with this one-of-a-kind, world-class experience.

Northern Air Mechanical offers air conditioning repairs, installs, ventilation, refrigeration, ductwork, and all other HVAC installation/repair services - both commercial and residential - to homeowners and businesses across the East Valley including San Tan Valley, Queen Creek, Mesa, Chandler, Gold Canyon, and Apache Junction.

Northern Weathermakers HVAC, Inc. provides a range of solutions, including in the scope of Building Automation, Equipment Replacement, Preventative Maintenance and HVAC solutions.

Based out of Minnesota, USA, Northern's One Hour Heating & Air Conditioning provides solutions like Air Conditioning, Heating, Furnaces, Air Quality and other HVAC services.

Northland Heating are HVAC contractors that provide service and repair for heating, air conditioning, boiler, and furnace systems. They also conduct sheet metal work, including ductwork, remodels, new houses, and more.

NovaFlex manufactures flexible ducting, hoses, extruded thermo-plastic ducts, adapters, PVC pipping, water and steam heaters, couplers and adapters. Designed for superior flexibility, for material handling, woodworking, welding exhaust, high temp., custom OEM applications and more.

NovelAire provides innovative indoor air quality solutions to Original Equipment Manufacturers (OEMs) serving the residential, commercial and industrial markets of the Heating, Ventilation and Air Conditioning industry. Serving hundreds of OEM accounts worldwide, NovelAire has attained a reputation for innovation, flexibility, and superior product quality and customer service.

NOW Specialties, Inc. is the exterior wall system designer, fabricator, and installer in Texas. NOW was the first ACM fabricator, and is still the only MCA Premium Fabricator in Texas. They provide fabrication solutions for the installation of barrier systems, rainscreen systems, louvers and much more.

NPM Heating & Cooling, LLC provides a wide range of heating, cooling and air quality solutions, which include AC installation and servicing, furnace repair, replacement and tune up, and home air quality solutions.

NuComfort is a Chicago-based wholesale distributor of residential and commercial heating and cooling systems, as well as replacement parts, indoor air quality products and home generators. They have been in business since 2002.

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.

NYC HVAC Contractor provides expert residential and commercial HVAC services across New York City, USA. From AC installation and heating repair to energy-efficient system upgrades, their certified team delivers fast, reliable service with unmatched professionalism and attention to detail. They are a licensed and insured HVAC company committed to fast, efficient, and high-quality air conditioning and heating services.

Oahu Air Conditioning Service (OACS) provides the highest quality air conditioning service to commercial customers of all sizes. They provide preventative maintenance and repair services to office buildings, hotels, condominium associations, banks, shopping centers, airports, hospitals, and various state and government buildings throughout Hawaii.

Oakley Transport is dedicated to transporting liquid food grade products in the contiguous United States and also Canada and Mexico. They are pioneers in the liquid bulk food grade transportation industry for quality service at a price sensitive value.

Oakwood Homes, a Berkshire Hathaway company, has always built, sourced and stayed true to what's local. By leveraging resources and partners right here at home, they can deliver true luxury in homes at every price point - for people in every stage of life.

Oasis Heating and Air Conditioning is a heating and air conditioning company in Milwaukee, WI. They are committed to providing their customers with the most reliable customer service possible. They specialize in HVAC installation, repair, maintenance, and water heaters. Their team comprises highly trained professionals who are experts in their field and will always strive to provide customers with the best service possible.

With the Occupational Safety and Health Act of 1970, Congress created the Occupational Safety and Health Administration (OSHA) to ensure safe and healthful working conditions for workers by setting and enforcing standards and by providing training, outreach, education and assistance. The OSH Act covers most private sector employers and their workers, in addition to some public sector employers and workers in the 50 states and certain territories.

Ocean Plumbing and Air provides high-quality residential plumbing, as well as drain cleaning, sump pump, and water heater services. They are a business owned and operated in the local community by Miami Plumbing Professionals. They provide both residential and business customers with a wide variety of heating, cooling and plumbing services.

OEI is a second generation, family-owned and operated business offering air conditioning and heating services to home or business. Rely on their certified technicians for advice, sales, repairs, and installations.

Oklahoma Chiller Corporation is a commercial and industrial HVAC company with offices in Tulsa and Oklahoma City. In addition to mechanical and HVAC services, Oklahoma Chiller offers building automation services and equipment rental services.

OklahomaGroup offers premier sales representation to all sectors of the HVAC and Refrigeration markets throughout the state of Oklahoma. Account Managers are dedicated to customer's needs and are supported by market and sales specialists.

Olans Heating and Air Conditioning, based out of Alabama, offers HVAC services, including Heating Services, Installation, Air Conditioning and Air Filtration. The goal of Olan’s Heating and Air Conditioning, Inc. is to provide a difference in the quality of services provided to his customers beyond other independent HVAC businesses.

Olsen Heating & Cooling Products - USA takes pride in offering a full line of heating and cooling appliances that includes the Olsen brand of oil furnaces. The full line of quality Olsen oil furnaces and central air conditioning offers brand recognition, application versatility and a wide range of energy efficient models that are easy to install and maintain.

A family owned business, Olson Comfort Services takes pride in offering the highest quality heating and cooling services. They are licensed, bonded, and insured.