Littleton Heating and Air conditioning company since1972. Localy owned, Lennox Premier Dealer. Member of BBB since 1984. We are committed to achieving excellence, efficiency and satisfaction in the installation and service of heating and cooling equipment by constantly striving to communicate to our customers, our employees, and to the community our total commitment to professional excellence and social responsibility.

Highlights, Specialties & Features

  • Furnaces, Air Conditioners, Humidifiers, Boilers, Water Heaters, Zoning, Air filtration

Professional Associations & Certifications

  • BBB A+ Rating
  • Haystack Colorado
  • Lennox Premier Dealer
  • NATE
  • EPA

Serviced Areas

  • Littleton, Denver, Aurora, Highlands Ranch, Castle Rock, Lakewood, Englewood, Parker

Payment Options

  • Money Orders, Discover, Financing Available, Personal Checks, Credit Terms Available, Debit Cards, MasterCard, VISA

Contact Details

  Person Littleton Heating and Air Conditioning
  City Littleton , CO
  Zip Code 80120
  Address 5737 S. Gallup St.
  Phone Number (303) 798-3880
  Fax (303) 798-8722

Products & Services

Promotions & Discounts


Older heating and cooling systems may run for years without major mechanical problems, but even so, they use so much energy that they become very expensive to operate. Equipment of fifteen years ago, like the automobiles of that era, is much less efficient than that of today.

In fact, most older furnaces are vastly less efficient than the models that Lennox now offers. For example, a typical gas furnace more than ten years old may operate at only half the efficiency of some new Lennox high-efficiency models.

Older heat pumps and air conditioners have the same drawback. Even units only five years old may operate at very low efficiencies, compared to today's Lennox models. In addition to costing you more to operate because of its low efficiency, every day you operate your old heating and cooling equipment, you run more of a risk of breakdown.

So whether you're faced with a breakdown or just know that your heating and cooling equipment is getting old, now is the time to replace it with a Lennox high-efficiency system.

Pre-season special

Spring is just around the corner.
Get your air conditioning system inspected to ensure that it is operating at maximum capacity and efficiency to reduce operation costs.
Call today!

Social Activity

Valentines Day is less than a week away, don't forget that special someone in your life. Happy Valentines Day from all of us here at Littleton Heating, Air Conditioning & Duct Cleaning
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We would like to wish everyone a Happy Holiday Season and hope you have a Very Merry Christmas and a Happy New Year
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We would like to congratulate Karly Berryhill and K&M Motorsports on a great year of racing and her 5th place finish in season points. We are proud to be one of her sponsors and look forward to supporting her again next racing season.
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We are proud to be partnered with the BBB Foundation/Student of Integrity Program. Together we founded the new HVAC Industry Scholarship Award to help students join our exciting industry.
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Warmer weather is just around the corner and your air conditioner will be hard at work. Don't forget to change your air filter and get your air conditioner serviced.
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Allergy season is here!
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Come on over to and schedule your appointment online.
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New Water Heater Standards effective April 16,2015 The new standards have made water heaters larger in height and diameter which will cause a lot of homeowners issues when it comes time to replace their water heater.
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