Our Home Comfort Specialists with the Major Service System™ customize residential heating and cooling solutions to fit your unique Colorado lifestyle.

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With 40+ years of experience, we are the only Commercial HVAC Specialists with the Major Service System™ that customizes solutions to your facility.

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We are the most respected Geothermal experts in the Rocky Mountain Region with over 1,000 systems currently operating as designed!

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Denver HVAC Company

We Believe in Doing the Job Right!

Since 1970, Major Heating and Air Conditioning has been providing quality heating and air conditioning to Colorado’s residents and facility managers. And today, we also provide renewable Geothermal for both residential and commercial projects. We strive to provide our customers with high quality customer service and products at an exceptional value. Our technicians are proficient in up-to-date system installation and service techniques. We take great pride in providing the Denver metro area with quality installations of new equipment and servicing existing heating and cooling systems. We specialize in everything that heats, cools, or looks like it does! We are proud members of the Better Business Bureau, with an A+ rating since 1983.

At a Glance

  • A + Rating with the BBB
  • Premier heating and air conditioning installation and servicing
  • Free estimates on new equipment
  • Customized maintenance plans
  • 24-hour Emergency service
  • EPA, LEED, and NATE certified technicians
  • Over 40 years of industry experience

Customer Reviews

”Honest and Professional“

Straightforward advice, honest assessment, professional in approach, quick to respond, on time and on budget, quality work.

Mike H.
”Friendly and Knowledgeable Service!“

Prompt, friendly and Knowledgeable! Major arrived within their promised time and took the time to understand what we were experiencing in the house. Cold upstairs while blazing hot in the basement in the winter. Hot upstairs and freezing in the basement in the summer. The Comfort Specialist provided different options to meet our needs (and budget) and was very knowledgeable about rebate options that were available to us. They even brought coloring books for the kids!

Doug G. - Highlands Ranch, CO
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