Carrier Factory Authorized Dealer. Carrier President's Award.

M and M

About Us

At M and M Heating, Cooling, Plumbing and Electrical, we target air quality issues specific to Longmont, CO & surrounding areas and your household. We address your concerns, accurately diagnosis your indoor environment, and provide effective strategies to ensure immediate and long-term improvement. Whether you’re confronted with excessive or insufficient humidity, air pollutants, fumes, or bacteria, we will help to provide a solution. As a Carrier Factory Authorized Dealer, our team is factory trained, industry certified, and regularly updated in techniques and technology specific to indoor air quality. Our fully licensed and insured technicians are dedicated to the health, cleanliness, and comfort of your indoor environment. By specializing in the most advanced and innovative options on the market, we offer a diverse range of products, certain to answer any challenge.
NATE. Financing available. Extended warranty. 24-hour emergency service. Maintenance agreements. Repair and replacement. Rebates.

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24/7 Emergency
Service Available


  • Commercial
  • Cooling
  • Ductless
  • Heat Pumps
  • Heating
  • Indoor Air Quality
  • Zone Controls