The Heating and Air Conditioning Experts
Call Today - (720) 366-1512
  • Services

    • Air Conditioning Service
    • Furnace Service
    • Maintenance
    • Cleaning
  • Heating and Furnace

    • Furnace Installs
    • Furnace Repair
    • Carrier Furnaces
    • Heating Repairs
  • Air Conditioning

    • Air Conditioning Installs
    • Air Conditioning Repair
    • Carrier A/C Units
  • Commercial

    • Commercial Heating
    • Commercial A/C

Serving The Heating and Cooling Needs of Longmont

M & M Heating and Air Conditioning is the leading choice for installation and repair and service for heating in Longmont, CO. We are dedicated to our craft and each technician holds multiple certifications.  We have solutions for Longmont furnace installation, minor and major repair services, and maintenance programs to keep your HVAC system in the best working condition for all of the seasons. Contact us today, and let us know how we can help you!

When you need a Longmont Colorado air conditioning company that you can rely on, call M & M Heating and Air Conditioning. Our company is dedicated to providing all of our customers with high-quality, efficient, and affordable service that they can depend on. M & M consider it an honor when a customer trusts us to work on their AC system. Whether you have a small issue or an extensive repair, you can trust that we will get the job done right the first time. We have built our reputation on providing our customers with the best service and support the HVAC industry has to offer.


Straight Forward Longmont Air Conditioning and Heating Service

At M & M Heating and Air Conditioning we are dedicated to providing the most complete service possible. By serving all major brands, we have the tools, and knowledge to service, repair or install the system that meets your households needs.
 We Provide Longmont HVAC services including:

Air Conditioning
Swamp Coolers
Indoor Air Quality
Duct Cleaning
Commercial HVAC Services

M & M Heating and Air Conditioning Service Vans


  • Locally Owned and Family Operated
  • Over 16 Years of Satisfied Customers
  • Trained and Certified Technicians
  • Licensed and Insured
  • EPA Certified
  • 24/7 Emergency Service
  • Service and Repair all Brands
  • 5 Star Reviews



Our Location in Longmont, Co

1312 Main St
80501 Longmont



Email address



Longmont Colorado heating and air conditioning experts. Specializing in furnace repair, installations, and service as well as air conditioning repair, installations, and service.

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  • Testimonials

    MandM is just perfect. They quickly grabbed what I want .. and provide with an amazing work.

    Om Ak Solutions