Mason Industries Inc. manufactures a complete line of vibration control products, including pads, mountings, hangers, rubber and stainless steel expansion joints for piping, seismic and shock control products.

MasTec Network Solutions is fully qualified and staffed to handle upgrades and maintenance on HVAC, generators, power plants and batteries. MasTec Network Solutions has performed tens of thousands of site & shelter inventories, site inspections and tower mappings.

Master-Bilt Products are commercial refrigeration manufacturers. Their product line also includes merchandisers, walk-in cooler and freezers, refrigeration systems, reach-ins, prep tables and ice cream cabinets.

For over 36 years Mastercool has been supplying professional quality air conditioning service tools and equipment. As one of the fastest growing companies in this market, our primary goal is to drive New Product Innovation and Technologies to make the every day work of the HVAC/R technician easier. Complete line of HVACR service and installation tools.

Matrix is the technology services company in Israel, with 10,820 employees worldwide. Since its foundation in 2001, Matrix has made more than 100 mergers and acquisitions and has executed some of the largest IT projects in Israel. The company specializes in the implementation and development of leading technologies ,software solutions and products, providing its customers with infrastructure and consulting services.

McCarty Bros. Inc. has been in the business of maintaining HVAC systems in the Chicagoland area for over 70 years. They do know a thing or two about it. They have service maintenance customers who have been with us for over 50 years.

Mee Industries, Inc. is a high technology company with a proven track record of providing innovative cooling and humidification solutions using the natural power of fog. Fog is a cost effective and environmentally beneficial solution for diverse applications including data center cooling, gas turbine inlet air cooling, HVAC & industrial humidification, outdoor air conditioning, greenhouse climate control and special effects.

Meek Refrigeration Inc. is a full service company specializing in Refrigeration, HVAC, Contracting, and Sheet-Metal/Ductwork. They are experienced in commercial and residential applications and carry a commitment to service and quality workmanship.

Merril Sheet Metal Inc. is a full-service HVAC company that has been serving Central & North Central Wisconsin since 1913. They are a family owned and operated HVAC company.

Mesaba Heating, A/C and Plumbing is the one stop shop that provides complete HVAC and plumbing services in Hibbing, MN. They endeavor to provide the best service possible to the clients.

METALFLEX has grown to become a nationwide company, serving the HVAC, plumbing, utility, industrial, food, oil and petrochemical industries, with 100% of our design, engineering, and manufacturing facilities done within the U.S.A.

Manufacturers of the innovative Metraloop expansion joint for thermal/seismic movement, Cablesphere, SDF and VaneFlex flow conditioning connectors, Metraflex makes a variety of engineered piping products.

Metro Heating & Cooling is a family owned and operated HVAC Company in St. Paul, MN. They have been providing the highest quality of air conditioning and heating repairs, installations and products to both residential and commercial customers. They are licensed, insured and bonded.

MetroTech has provided HVAC solutions leveraging a technology-enabled modern work order management system throughout the US since 1986. MetroTech Service Corporation is a privately held HVAC service company providing preventive maintenance, emergency service repairs, and HVAC design/installation services to prominent multi-site commercial and retail customers across the United States.

Meyer Machine Supply & Equipment LLC is a renowned US-based manufacturer of electric and gasoline powered vacuums for air duct and dryer vent cleaning, as well as a complete line of supplies.

Micek Heating & Air LLC is a local heating and cooling specialists based in Omaha, NE. They are bonded, insured and committed to providing the best possible service to the customers.

Micro Matic is dedicated to providing world-class beverage dispense equipment and solutions by focusing on unparalleled product quality and testing, on-time delivery, and world-class customer service.

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 Heating, Cooling & Plumbing service and maintain all makes and models of furnaces and air conditioners in the customer's homes. When they need a new system, they select only the most reliable systems from Trane or Lennox for the customers.

MidWest Materials is a Steel Service Center providing coated, hot rolled, HRPO and cold rolled steel in coil, sheet or plate. Processing includes stretch leveling, corrective leveling and more.

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

Midwest Tool, manufactures tradesman quality hand tools for the HVAC/metalworking market. As a pioneering innovator and manufacturer of metal cutting snips and specialty hand tools. Midwest has developed and owns numerous product design and utility patents that enhance Midwest product performance.

Mike Mulligan Refrigerants provides HVAC Contractors with customizable R-22 Refrigerant Buyback Programs and Direct Refrigerant Sales.

Mike’s Bremen Service has merged with Comfortmate Heating and Air. Both family-owned companies are well versed to install and service all heating and cooling equipment, as well as most appliances. They look forward to continuing to serve all customers heating, cooling, and appliance repair needs.

Mill Creek Heating has been serving the Willamette Valley of Oregon since 2003. They are a family owned and operated business. They care about the family’s comfort, health and safety.

Miller-Leaman, Inc. was founded in 1991 by Bill Miller, Marty Shuster and Robert Leaman. With over 28 years of experience in manufacturing filtration products for our customers, Miller-Leaman, Inc. has the know- how and credibility to deliver the right product.

Milwaukee Valve provides valves and actuators for industrial, commercial, fire protection, dry bulk hauling, marine industries, ball, butterfly, gate, globe, check valves, and actuation.

As the southeast’s distributor of heating, cooling and ventilation products, Mingledorff's work closely with exclusive brands such as Carrier, Bryant, Heil, and more.

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.

MLD HVAC Services is committed to offer reliable HVAC services for clients. They are a BBB Accredited Business offering a guarantee of quality craftsmanship on all the woks they deliver. Their major services are confined within preventative maintenance, heating & cooling services and provision of quality energy solutions.