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.

Met One Instruments Inc. provides reliable, affordable, precision instrumentation for monitoring ambient and indoor air quality.

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.

Meticulous Market Research Inc. is a trusted research partner for businesses around the world, providing market intelligence focused on building revenue transformation strategies. Its research is used by Fortune 500 organizations to attain success by scouting next-generation revenue opportunities well ahead of their competition.

Metrex has designed and manufactured innovative Pressure, Thermostatic, Electric and Electro-Hydraulic Actuator valves, as well as, HVAC Water Regulating and Seawater Condenser Regulator Valves. They are the most trusted name in refrigeration and heat transfer solutions in the world.

Metro Express Service has been serving the North Texas area with pride as one of the residential and light commercial HVAC service companies in the Dallas Fort Worth area ever since.

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.

Miami Heating & Cooling is a full service heating and air conditioning company that specializes in fulfilling HVAC needs of both residential and commercial customers.

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.

Michall Daimion Heating & Air Conditioning, Inc. specializes in duct work fabrication, indoor air quality, diagnostics, service, repairs, and routine maintenance.

Michiana Heating & Air Conditioning Inc., is the trusted HVAC company that fulfills home comfort needs. From tailoring the perfect heating and cooling system installation to solution and repair, they are confident that they can exceed the expectations.

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.

Micro-Air designs and manufactures temperature control systems primarily for applications in the Home, RV and Marine industries. Since its start in 1983 and through its transition to its current manufacturing plant in Allentown, New Jersey, the Company has been a design innovator. The Company maintains unparalleled institutional knowledge of the recreational air conditioning industry.

Microsoft is a globally renowned software and IT solutions company with headquarters based in Redmond, Washington. The company provides a wide range of services, including Business Software, Developer Tools, Home & Educational Software, Tablets, Search, Advertising, Servers, Windows Operating System, Windows Applications & Platforms, Smartphones, Cloud Computing, Quantum Computing, Future of Work, Productivity and Artificial Intelligence.

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.

Middleton Heating & Sheet Metal, Inc. is a family owned and operated heating & air conditioning company that has served Corvallis and its surrounding areas for over 64 years. During this time, they have provided the finest heating and cooling products and equipment lines available, along with the highest level of experience and service to complement those products.

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 Mechanical Solutions solves problems through applied HVAC solutions. It develops and maintains relationships with Commercial and Industrial Building Owners, Consulting Engineers & Contractors.

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.

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.

Mike Derrick A/C & Heating Co., Inc., is a locally owned and operated HVAC company. Since its inception in 2005, they have focused on residential solution and installations. They have installed systems in new construction, fire restorations, and home renovations, and now they service all brands.

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.

MIL-RAM TECHNOLOGY INC. designs/manufactures gas/flame detectors and detection systems, to detect hazardous gases, Toxic/Combustible LEL/Oxygen/VOC, for personal safety environmental protection and process controls since 1990.

Milestone is a pioneer in home services across the DFW area. They provide same day electrical repairs, plumbing, drain cleaning, HVAC installations, window cleaning, security installations and more.

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 Manufactured Home Products is a company that estimates, repairs, servicing furnaces, air conditioners and heat pumps. They are also a renowned sellers of HVAC products.