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.

Noveo manufactures 'plug-and-play' 'ventilation-on-demand' technologies that automatically control exhaust systems for industrial paint Booths, and commercial kitchens, (DCKV-Demand Control Kitchen Ventilation)-energy savings 30-80%.

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.

NRB Inc. is an established and reputable leader in off-site commercial modular construction and building automation systems. They provide a faster, more sustainable alternative project delivery method. From innovative design engineering through off-site fabrication in a controlled environment, to final on-site completion, their projects range in size and scope and include a wide range of applications.

NS Aircon is the best AC, refrigerator, microwave oven, and washing machine repair and service center in Vasai, Virar, and Nallasopara regions in Mumbai. They provide 24/7 service and assistance can be presented in 1 hour at the doorstep. Their qualified engineers use their huge business knowledge to quickly identify problems and resolve them in low-end estimates.

NSG Heating and Air Specialists, LLC stands as a beacon of relief for those enduring the soaring temperatures in Fort Worth, TX. Specializing in all facets of Fort Worth air conditioning repair – from installations fine-tuned for optimal airflow to thoroughgoing repairs – they aim to keep their living or work area at the perfect temperature all year round.

NSI brands bring seventy years of expertise in the HVAC industry, from tools and adhesives to machinery designed to make insulation fastening efficient and trouble-free.

NSK is the globally renowned manufacturer of bearings, linear technology and steering systems. NSK products are used in all kinds of rotating equipment and industries including but not limited to machine tools, robotics, railways, wind turbines, production machinery and vehicles to help improve both reliability and efficiency.

NTI manufactures only top-quality hydronic heating equipment. Acknowledged as a pioneer in research and product development, NTI is a pioneer in developing the most advanced and efficient home heating equipment, including gas boilers, water heaters, combi furnances, hot water tanks and solid fuel boilers.

NTT DATA – a part of NTT Group – is a trusted global innovator of IT and business services headquartered in Tokyo. They help clients transform through consulting, industry solutions, business process services, digital & IT modernization and managed services. NTT DATA enables them, as well as society, to move confidently into the digital future.

NTT Training is about delivering very practical hands-on safety and trade skills to workers around the world. They deliver the most comprehensive, skills-based HVAC training programs and Hands-On Training.

Nu-Air designs and manufactures high quality heat recovery ventilators (HRV's), energy recovery ventilators (ERV's), air handlers and vertical fan coils with integrated H/ERVs. Their primary markets are commercial, residential, multi-unit residential and institutional.

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.

Founded in 1966, Nuaire is an indoor air quality and ventilation manufacturing specialist, with multi-award-winning ventilation systems that are used in a wide range of commercial and residential applications, including hotels, houses, stadiums, museums, and healthcare services.

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.

Established in 2007, Jason and Jane Adderley set up Fox Fittings UK after over 20 years of experience within the electrofusion fitting industry. Initially trading from their home, the company offered a more friendly and reliable service than their larger competitors.

NUPI AMERICAS, INC. was founded in 2001. It is located in Houston, TX where it established a warehouse and production facility. Another warehouse and operations centre is located in Early Branch, SC. NUPI Americas is responsible for sales and marketing activities for the Americas and now also has 2 production lines. It also expanded the use of multilayer technology to the upstream market developing a specific product for flow line applications.

Nuvolo is the pioneer in modern, cloud-based Connected Workplace solutions. They provide a single platform to manage all people, all physical locations, all assets, and all work – enabling data sharing across departments.

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.

Nyle Systems is a manufacturer of commercial energy-efficient heat pump water heating systems.

O.T. Hall & Son has been successfully promoting electrical, lighting, heating and networking products since 1920. They are family-owned and operated and service Maryland, DC, Virginia, Delaware and the panhandle of West Virginia.

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.

Oak Grove Heating & Air Conditioning they supply reliable HVAC systems and quality work in Hattiesburg. Their techs are knowledgeable in a wide range of services, so one can be confident in the outcome they have.

Oakes Energy Services Ltd (Oakes Energy) designs and installs both commercial and domestic renewable energy systems. In turn, dramatically reducing the cost of energy consumption and enabling the business or home to save thousands of pounds on their energy bills. Oakes Energy Services Limited was established in 2007 with the aim of offering customers an alternative, more sustainable approach to their energy needs.

Since 2000, Oakleaf Commercial Services has been providing high quality, professional, property maintenance and construction services. They also offer a wealth of services including responsive repairs, building construction, modernizations and adaptions, grounds maintenance, fleet services, a PVC-u manufacturing facility and a bespoke joinery workshop.

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.

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.