McQuay International delivers engineered, flexible solutions for commercial, industrial and institutional heating, ventilation, and air conditioning (HVAC) requirements with reliable products, knowledgeable applications expertise and responsive support.

The Mechanical Contractors Association of America (MCAA) serves the unique needs of approximately 2,600 firms involved in heating, air conditioning, refrigeration, plumbing, piping, and mechanical service.

Mestek, Inc's HVAC equipment group and controls group is among the foremost manufacturer of heating, ventilation, and cooling products including residential and commercial hydronic heating equipment with intelligent controls and air conditioning.

Mid-City Supply Co., Inc. provides contractors and home-owners with the highest quality Plumbing, HVAC, Refrigeration, PVF, and industrial products. Their well-trained and friendly associates allow Mid-City's Partnership Philosophy to deliver the best value-added services in our markets while maintaining competitive wholesale prices.

With their headquarters in Jonesboro, Arkansas and six other locations throughout the State, MSS sells diesel fuel, gasoline, aviation fuel, motor oils, hydraulic oils, gear lubricants, greases, etc. to a wide variety of industries, farmers, implement dealers, manufacturing companies, municipalities, car dealerships, oil change shops, tire stores, and trucking companies make up a portion of the large customer base.

Representing quality HVAC/R manufacturers in Illinois, Indiana, Wisconsin, Minnesota, Dakotas and the UP of Michigan. They also offer warehousing services in 42,000 square foot warehouse in Chicago.

Midwest is a leading wholesale supplier of HVACR equipment and service parts. They mostly serve their Northern Michigan markets.

Midwestern Mechanical, Inc. with Copper Cottage is an industry-renowned company that offers superior plumbing, heating, air conditioning, and fire protection services. They also handle various heating, air conditioning, and indoor air quality systems including, Furnaces, Boilers, Heat pumps, Thermostats, Air conditioners, Ductless mini-split ACs, Air purifiers, Air cleaners, Humidifiers and In-floor heating solutions.

Miller-Weiss-Kruse Inc. is a representative of quality manufacturers to the HVAC/R industry throughout Indiana, Wisconsin, Illinois.

Mitsubishi Heavy Industries, Ltd. delivers innovative and integrated solutions across a wide range of industries from commercial aviation and transportation to power plants and gas turbines, and from machinery and infrastructure to integrated defense and space systems.

MJM Associates is a multi-line field sales and marketing agency representing quality HVAC/R manufacturers throughout the Rocky Mountain States.

For the past 20 years, Morris Heating has been a leading provider of home and commercial heating repairs, service and installation. With a dedicated team of furnace repair specialist on the staff at Morris Heating, property owners can rely on them to ensure all furnace repairs in Morris, NJ region are completed on time and within an affordable budget.

Morts – provides heating and plumbing services like amana heating and air conditioning system, central air conditioner installation, high efficiency gas furnace and air conditioner, high efficiency heating and cooling systems, hvac air conditioning installation and maintenance, condensing gas furnace heater installation, service and repair.

MOS Mechanical offers a complete building, building maintenance and building renovation service. The company's building, maintenance and renovation division can always deliver the best quality, design, and value for money end product, be it domestic, commercial or just a simple revamp of a room.

The Fourth Industrial Revolution is here and Motivair is uniquely positioned to support its continued evolution. They wide range of products are focused on providing customized cooling solutions for the critical infrastructure and technology behind the world’s businesses, allowing them to offer better products and services while generating higher revenues and profits for their investors.

MrPEX Systems is a supplier of radiant heating/cooling, snowmelt, plumbing, pex-al-pex systems. Featuring uniquely flexible PEX-a tubing, manifolds, accessories and controls.

Established in 1914, MSA Safety Incorporated is the global pioneer in the development, manufacture, and supply of safety products that protect people and facility infrastructures. Many MSA products integrate a combination of electronics, mechanical systems, and advanced materials to protect users against hazardous or life-threatening situations.

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.

Munch's Supply is a wholesale distributor of Heating, Ventilation and Air Conditioning (HVAC) equipment, parts and supplies servicing the Chicago, Northwest Indiana and Michigan.

N & S HVAC provides customers with the finest selection of quality plumbing, heating and HVAC products, at affordable prices.

The National Ground Water Association represents groundwater industry professionals including contractors involved in geothermal heat pump drilling and system installation.

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.

NAVAC is a global manufacturer that has dedicated over 20 years to the R&D and manufacturing of industrial vacuum solutions and HVAC/R tools. NAVAC draws upon its commitment to technical innovation, strong customer service, and robust R&D allocation to deliver solutions offering unsurpassed efficiency, accuracy, and ease of use.

Navien, the provider of condensing technology, uses innovative technology to manufacture energy efficient products that provides the ultimate comfortable living experience and a healthier environment.

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.

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

Nexus offers solutions in hydronic heating and chilled water cooling systems. Products range from Balancing & Control Valves, Air/Dirt Separators.

NJR Home Services is a trusted HVAC company dedicated to providing top-notch home comfort solutions. Specializing in furnace installation, air conditioning installation, and water heater installation, they cater to various heating and cooling needs. They offer customers home comfort solutions, including equipment sales and installations; lease and purchase of solar; and Comfort Service Plans, including heating, cooling, water heating.

Noble Company will implement a running change to the edges of our Solid Curbs. Effective immediately, Noble Solid Curbs will now be manufactured without the corner radius. Refer to the illustrations below. This does not affect the performance of the curb or the installation.