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Our HVAC Services.

Residential AC Installations

Air Conditioning

We service and install central air conditioners.

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Residential Furnace Installations

Heating

We service and install central heating furnaces as well as garage heaters.

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Residential Air Purification Installations

Electronic Air Filtration

We install and service electronic air filtration for your central heating and air system.

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Licensed and Insured – Heating and Air Conditioning Installs and Maintenance.

Welcome to Circulating Air Heating and Air Conditioning Company. We were established in 1994 in the Boulder County area. We have over 30 years experience and offer honest and reliable service. We offer reasonable rates for the installation and maintenance of heaters, air conditioners, humidifiers and electronic air cleaners.

We offer a no "trip charge" and a free second opinion!

Has a licensed contractor or home inspector discovered an issue with your heating, air conditioning, or ventilation system? Do you need a second opinion from a licensed HVAC expert? We offer a free second opinion with our expertise. At Circulating Air, we also never charge for making a trip out to your location for services or installs. Need more information about our services, installations, or HVAC repair? Contact us here, and we will respond promptly.

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Circulating Air Logo circa 1994-2017

The Circulating Air Standard

25 Years of Honest, Reliable, and Ethical Business!

When it comes to operating our HVAC business, we believe that honesty, ethics, and fair business practices come first. In order for us to sustain our long-term success servicing the local community, we knew that we had to develop and maintain honest and strong relationships with our clients. Nearly 25 years later, we still maintain many of those relationships with our clients.

We price our services and installations fairly, we provid a "no trip" charge, we are prompt and always on time, and above all, we are friendly and reliable to our clients.

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Don't Just Take Our Word for It!

I have been using Bob and his team for 18 years. Circulating Air is honest and reliable whether you are installing a new heat and air unit or having a service. They are prompt and respectful if your home. 5 stars!

-Pat Manwell

Bob is the most honest contractor I know, and I know a lot of contractors. His prices are fair and there is a reason he has all these 5 star reviews.

-Justen Staufer

When the company couldn't come to fix our heater because they were booked solid for the entire week (speaks well of the company), they referred a trusted competitor because they were concerned when we told them there was a small child in the home! The weather then was still warm enough, so we waited instead of using the competitor. A couple days later, the company had an open spot and Tony fixed the heater. A few days after, the heater quit working again. Bob came out, fixed the problem at NO additional charge. WOW!! Honest, fair, wonderful people.

-Chin Ong

Complete Residential Heating & Air Conditioning Services in Longmont, Boulder, Niwot, Berthoud and Surrounding Areas.

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Circulating Air Contact Info
    Phone: (303) 772-7960
  • 500 9th Ave #12
    Longmont, CO 80501
  • Servicing Longmont, Boulder, Firestone, Berthoud, Loveland & surrounding areas.
  • Hours of Operation: Monday-Friday 8:30 AM - 4:30 PM

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