M&M Refrigeration is the most experienced CO2 refrigeration company in the Americas. M&M has designed, manufactured, installed, and serviced refrigeration systems for 50 years—they literally have hundreds of industrial refrigeration systems around the world.

Mace MEP Services are an international consultancy and construction business. They shape the cities and communities of the future by connecting clients, communities, suppliers and partners. They have a highly experienced mechanical, electrical and public health (MEP) team that drives efficiency and value on site by offering specialist contracting capability that drives value and efficiencies on one of the largest construction packages on site.

MacLellan Integrated Services provides critical process cleaning services, process equipment and robotics maintenance, production line side support, sludge and wastewater management, HVAC and mechanical services and general facility maintenance. Their work environments include automotive, aerospace, and general industrial applications.

Madison Industries is a globally-renowned mechanical engineering, HVAC equipment and industrial automation solutions firm conglomerate based out of Chicago, Illinois, USA. The conglomerate believes and strives in providing a safer and healthier world, with state-of-the-art electronics, HVAC equipment, home and building automation systems that are energy efficient and cost effective.

Established in 1989, Malek Service Company has been a trusted provider of residential and commercial plumbing and HVAC services in College Station and Central Texas for over 30 years. Their team of experienced and licensed technicians offers a wide range of services, from air conditioning repair and heater maintenance to comprehensive plumbing solutions. They specialize in air conditioning, heating, plumbing, and electrical services.

At Malek Service Company, they recognize the urgency of resolving home service issues promptly and effectively. Their skilled technicians serve around the clock, ensuring swift and dependable solutions. Malek Service Company has been dedicated to serving the College Station area for an extended period, establishing a renowned reputation for excellence and dependability.

Mallory has provided industrial organizations with safety expertise and supply chain efficiency along with a broad array of safety products and solutions. They provide HVAC and refrigeration products, valves, hose, plumbing materials, Pipe, Tubing & Hoses Accessories, shut-off valves and much more.

In 2022, the Professional Plumbing Group (PPG) joined the Marcone Group. PPG and its affiliated companies – which have a history stretching back 150 years – design, manufacture, market and distribute high-quality plumbing products and solutions.

Motors and Armatures (d.b.a. MARS) is a family-owned and operated supplier of quality motors, components, and service/installation parts for the HVAC-R industry. The company distributes its own extensive MARS and JARD branded aftermarket replacement products, as well as the original equipment components of leading manufacturers.

Martin Brower is an innovative global supply chain leader providing end-to-end solutions for restaurant chains across 18 countries. They are a company with innovation at the core, where ingenuity is continually encouraged and imagination is carefully nurtured. It is a multi-billion dollar company, fueled by constant innovation, enduring customer loyalty and smart acquisitions.

Martin Systems, Inc. is a Wisconsin based systems integrator specializing in integrated security, HVAC systems, fire protection, and life safety. They provide HVAC Systems, Commercial Security, Office Security, Alarm Systems, Camera Surveillance, Access Control, Home Security, Fire Protection, Home Automation, Security Systems, Burglar Alarm, Door Access Control, Fire Alarm, Life Safety, Fire Alarm Inspections, Fire Protection, CCTV solutions.

Mascot Mechanical, LLC has been providing outstanding air conditioning and heating service for more than 10 years in DFW Metroplex.

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.

McKinstry is a US-based energy efficient systems and advanced renewable energy systems firm. From new construction and ongoing operations to adaptive reuse, energy retrofits and advanced renewable energy systems, McKinstry provides a single point of accountability across the entire building lifecycle. Services offered include Energy Performance Contracting, Energy Services, Smart Buildings, Renewable Energy, Zero Energy and Energy Audit.

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.

MSCA is a renowned organization for HVACR contractors, providing education, marketing, and labor/management services to assure its contractor members deliver quality performance, value and expertise for all building system needs.

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.

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 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.

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.

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.

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.

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.