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Reliant Heating & Air Conditioning Services, LLC

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12 Years In Business

Company Details

  • Bilingual

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9451 Welby Road, Unit 111
Thornton, CO 80229


  • Mon: Open 24 Hours
  • Tue: Open 24 Hours
  • Wed: Open 24 Hours
  • Thu: Open 24 Hours
  • Fri: Open 24 Hours
  • Sat: Open 24 Hours
  • Sun: Open 24 Hours
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Service Details

    Areas of Expertise

    • Central A/C
    • Furnaces
    • 24/7 Emergency Service
    • Ductless MiniSplits
    • Boilers and Water Heaters
    View All Offerings and Cities Served

    Cost Information

    • Free Estimates
    • Warranty Offered
    • Credit Cards Accepted
    • Save 95%

      Save 95% on free water heater or 5 years free maintenance wh ...

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    • Save 95%

      Save 95% on New water heater or whole house humidifire when ...

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    • Save 50%

      Save 50% on Any Hvac equipment diagnostics

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    52 Verified Reviews
    • 5
    • 4
    • 3
    • 2
    • 1

    Highly rated for

    • Quality
    • Value
    • Customer Service
    Showing 1-10 of 52 results
    4.5 Rj S. Denver, CO

    So on top of what they do....

    5.0 Norm S. Centennial, CO

    They came in lower than the rest of the bids I received. They were prompt and responsive.

    5.0 Will M. Denver, CO

    "I am a huge fan of Marc and this team at Reliant! We have worked on at least four jobs together now and my confidence about Reliant’s capabilities and commitment to their customers has grown with each project. For me the test of a good contractor / business partner is how they handle adversity because in construction unexpected things always come up. Marc is creative, solution oriented, impeccably reliable (just like company name implies) and above all a real pleasure to work with! I highly recommend Reliant."

    5.0 Henry W. Golden, CO

    5.0 Ellen W. Golden, CO

    So glad I found this company. Marcin knows his stuff!

    5.0 Denver, CO

    Furnace went out during cold spell. Inquired about Reliant on HomeAdvisor and received call from them. HomeAdvisor contacted Marcin and he called me almost immediately. Scheduled appointment for that afternoon. Marcin arrived in time window that he stated, looked the situation over and gave me an approximate estimate. I hired Reliant to do the work and Marcin and his helper replaced my furnace two days later. During the replacement (which took almost 6 hours), they were extremely professional/efficient, courteous, left the utility room clean and had the new furnace running. They also installed a water heater that I had purchased. Marcin procured a permit from the City of Thornton at my request. Inspector had minor issue with some venting. When I contacted Marcin about it, he came out and corrected the problem. Over-all, I was extremely pleased with Reliant and highly recommend them for issues related to Heating and Air Conditioning. It was a pleasure dealing with Marcin. I will use them in the future, if the need arises.

    5.0 Delores L. Denver, CO

    He was so nice and really checked things out really well. He is now my go to radiant guy

    4.0 Dennis P. Golden, CO

    Pleasant people to work with and they did a good job.

    5.0 Chase G. Aurora, CO

    They helped me out and showed me how to replace the fuse for next time, and gave me a spare... outstanding service


    Reliant Heating & Air Conditioning Services, LLC
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