Hours: We are open 24/7

Castle Rock, CO | Colorado Springs, CO


Maintaining your heating system in peak condition saves you time, money, and aggravation.  And when you count on Allied Heating & Air to handle seasonal service, we make it convenient and affordable.  Contact us at 303-805-1161, and we’ll accommodate your schedule, arrive promptly, and complete the necessary tasks quickly and without disruption to your property.  Family owned, we concentrate on our customers, targeting your specific requirements and delivering greater value for your investment.  Established in 1972, Allied Heating & Air is your dependable source for essential maintenance throughout Castle Rock, CO & the surrounding Denver metropolitan area.

Preventative Heating Service & Furnace Maintenance

Allied Heating & Air upholds a complaint free A+ rating from the Better Business Bureau through friendly and conscientious workmanship.  Our NATE-certified, highly trained team of technicians adhere to rigid procedures to optimize energy efficiency, system longevity, heating capacity, and equipment reliability.  You’ll benefit from minimized running costs, enhanced air quality, superior comfort, reduced sound levels, and safe operation.

Contact our team for all your heating service needs!

Relying on state-of-the-art diagnostic equipment, we catch problems before they turn into major repairs, preparing your heating system for the upcoming winter.  Plus, we offer a comprehensive Maintenance Program for homeowners to receive two annual service visits per year. For all makes and models, Allied Heating & Air is the right choice for seasonal maintenance throughout Parker, Greenwood Village, Castle Rock, Highlands Ranch, and Lone Tree, CO.

Heating Maintenance & Heater Maintenance in Highlands Ranch, CO

Heating Service, Furnace Maintenance, Heater Maintenance & Furnace Service Highlands Ranch, CO, Lone Tree, CO, Castle Rock, CO, Parker, CO & Greenwood Village, CO

Heating Maintenance & Furnace Maintenance in Highlands Ranch, CO

Heating Maintenance ∴ Castle Rock, CO ∴ Lone Tree, CO ∴ Greenwood Village, CO

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Customer Reviews

Shannon H.

Allied came highly recommended from another company that couldn’t get to my house to fix my dead furnace on the coldest day of the year. Their call center folks were very pleasant and had a technician to my house within the hour. The tech was very knowledgeable and had my furnace up and running within 2 hrs. I will use them again.


If you need repair, new equipment, or just have questions, Allied is the go-to HVAC company in the Denver Metro. They are simply one of the good companies around who actually provides quality service. They are technically knowledgeable, helpful, and good at what they do.

If you are unsure or wavering, rest assured, they will help you out. I will definitely use them again!

Terry Taggart

Jon did a wonderful job repairing our evaporative cooler. He diagnosed the problem, over nighted the part, and repaired our unit in record time. We greatly appreciated his honest assessment and reliable repair. We would definitely us Jon and Allied Heating and Air again.

Brenda T

I contacted Allied today because my furnace stopped working last night. I called the office at 8:00am and the front desk person was extremely friendly and told me that they were pretty busy but would try to get me in. She called back 10 minutes later and said that she moved some “non-emergency” calls around so she could get a tech to my house asap. The tech showed up 20 minutes later and fixed my problem. I would highly recommend this company for not only their speedy response but for actually caring about my family and doing everything they could to make sure we had heat!

Shannon H

In the fall, we had got a bid to move our air conditioner from our deck over to the side of our house, and it was almost $7000! There was no way we could afford to do that, so we resigned ourselves to talking over our loud air conditioner in the summer months. However, Allied came out to bid the project, and came in more than $5,000 less!

The guys were out yesterday, and I couldn’t be more pleased. They were to my house at the beginning of the time window (not waiting around for them to show up). The technicians were very knowledgeable, and checked in with me if they ran into any issues (there were a couple) before continuing. My air conditioner is running better than it ever has as they cleaned all the gunk out that had collected over the years, and now I can sit on my back deck and have a normal sound level conversation! I will use them again, and recommend anyone to do the same.

Mike Stein

Awesome customer service and Ed was a great furnace technician. Answered all my questions and put me at ease. I would use Allied again and refer to friends.

William B

Very quick response, even on a weekend. Their work was very professional and honest. They covered my issue under warranty, even though the warranty had expired.

Brian S

I’ve used Allied for a number of my HVAC needs, from the yearly furnace tune up to a full scale blower motor replacement. The receptionist staff is always very friendly and doesn’t transfer you to three techs to answer your question.

The service guys have all been on time (or early, which is awesome) and are considerate about wiping their feet, not touching the walls and in their post-work cleaning. Never had so much as a scrap left on the floor.

Their prices are a bit high, but I’d rather pay for good work and good service.

Heating Maintenance

Greenwood Village, CO

Parker, CO

Highlands Ranch, CO

Lone Tree, CO

Castle Rock, CO