Reviews of local pros in Boulder, Colorado

I reached out to Comfort Zone Heating & Air Conditioning when my hot water boiler started acting up, since their website mentioned they specialize in boiler repairs. Not every HVAC company really understands boilers, but these folks do. While they were here, I also had them check on my forced air furnaces just to be safe. The boiler repair ended up being a bigger project than I first thought, but Craig and the team really knew their stuff. They were friendly, professional, and made sure to explain everything that needed fixing on the boiler. They worked quickly and the cost was very reasonable. From now on, this is the first place I’ll call for any heater repair or maintenance.

After checking out lots of reviews and estimates, we chose Comfort Zone Heating & Air Conditioning for our furnace repair and replacement in Boulder, and it turned out to be a great choice. Micah arrived right on time and was very professional, offering a fair and clear estimate. What really stood out was his calm attitude—he explained all our options without any pressure, and made sure we felt comfortable with our decision. From the fast response to the high-quality work, everything went smoothly. We’re really pleased with the whole process and would happily recommend their furnace repair services to anyone in Boulder.

My husband and i don’t usually write reviews, but we wanted to share our experience with Comfort Zone Heating & Air Conditioning. We needed a new furnace since our old one wasn’t heating properly anymore. Craig came by for a consultation, and he was respectful and took the time to explain which furnace model would be best for our home, considering things like the size of our house, how much sun we get, and our ductwork. We were thinking about getting a high-end furnace, but Craig explained the different efficiency ratings and what would actually work best for our needs here in colorado, where winter temperatures can get really cold. He was honest about the pros and cons of each option, and it was nice that he gave us all the information without pushing us to buy the most expensive unit. After his explanation, we decided to go with the furnace he recommended. The quote for the furnace, installation, and parts was fair—I even checked the price of the unit online and felt that we were getting a good deal for the service provided. Craig came himself to do the installation, and he brought along someone he was training. They arrived on time, were polite, and made sure to keep our home clean. While working on the furnace, Craig showed us how our system worked and gave us tips on how to keep it running smoothly and efficiently. As first-time homeowners, this was really helpful. He even cleaned around the furnace area and took care of some mess left behind by the old unit. Overall, we had a great experience. We’ve worked with a lot of contractors during our house renovations, and i have to say Craig was one of the best. We’ll definitely call again if we need more heating or furnace work in the future, and would recommend to our friends.

I had two Mitsubishi heating and cooling split units installed by Comfort Zone Heating & Air Conditioning because they offered the best price and warranty compared to others. The team was professional and showed up right on time for the furnace installation. After some time, I noticed the units weren’t working as efficiently, but Justin came out quickly, figured out the problem, and explained everything clearly. He also gave me helpful advice on regular furnace maintenance and what extra care might be needed down the road. Everyone I interacted with was responsive and clearly knew what they were doing when it came to furnace repair and upkeep.

Absolutely fantastic heater repair service! Here’s what happened: After moving into my new house in Boulder, I quickly realized some rooms just weren’t getting warm from the baseboard radiator boiler system. As winter in Colorado set in, the lack of heat became impossible to ignore. Worried about the cost, I reached out to a local HVAC company, and to my surprise, Micah arrived at my door within 20 minutes. Micah was not only prompt but also extremely knowledgeable and friendly. He carefully explained how my heating system worked and taught me how to bleed air from the pipes to make sure every room got warm. It was great how he took the time to educate me, not just fix the problem. Even better, there was no charge for the visit. I was so grateful for that. Later, when I started planning a remodel, I called them again for advice and a quote on upgrading to a new furnace and adding central air. The estimate was fair, and Micah gave me helpful tips on ways I could save money—like removing parts of the basement ceiling and old piping myself. His advice was practical and made me feel confident about handling some of the work. When summer rolled around, I tried contacting a couple of other HVAC companies in Boulder for comparison, but no one ever got back to me. Meanwhile, this team always answered my calls and even came by several times to answer questions and check things out. Their customer service is truly outstanding—they genuinely care about helping people. When it came time for the installation, Paul and Duane arrived right on schedule. They were both friendly and very professional. The heater and central air install went smoothly, and they even went above and beyond—finding a live wire in the basement and setting it up for the new air conditioner, which saved me from having to hire an electrician. They also helped remove some parts of the ceiling and old walls for my remodel, fixed a broken light, and got rid of unused wires in the basement. I can’t say enough good things about this company and their team. My house finally feels warm and comfortable in every room, and the new central air is working perfectly. I highly recommend their heater repair and HVAC services to anyone in Boulder. Don’t waste your time with other companies—these folks are the real deal!

We decided it was time to upgrade our almost 30-year-old natural gas furnace, and also add AC to our home in Boulder. i got quotes from five different contractors, comparing prices and how well we connected. what i found out is the installer really makes all the difference when it comes to furnace replacement. Comfort Zone Heating & Air Conditioning walked me through everything i needed to know about furnace options, making things easy to understand. when the crew arrived, they were very professional and started working right away. they carefully took out the old furnace and made sure the new furnace was installed and running before finishing up the first day. on the second day, they came back to finish installing the AC. the team, including duane, kept everything clean and always communicated what was happening, which i really appreciated. once the job was done, they also ran a duct leak test, which helped me learn more about making our home's energy use better. overall, i'm super happy with the work and would definitely use their furnace repair and installation services again in the future.

Thomas communicated well during the entire process. That included calling when he was on the way, arriving on time, and informing me of the condition of products during the service. He took his time and made sure everything was clean and working properly. I was extremely satisfied with his work.

Thomas from DNI was just out to conduct our annual maintenance. He worked on each unit thoroughly completing the job right the first time. Thomas was professional as well as respectful of our home. He explained in detail the work he conducted.

Thomas was very nice, did great work, and made a best friend of our dog.

Thomas did great work. Quick, easy, painless. Very happy with it!

Brayden and Zach did a great job with the installation of our new furnace. They explained how to operate all the new equipment and cleaned up thoroughly.

Great service! Thomas went above and beyond by helping me learn parts of my new system and gave me several pointers even though he just came to clean the vents.

Thomas was very helpful in explaining the activities and needs. Very friendly, reliable and professional service. Thank you!

Thanks Dean for the help

Dean is awesome

Professional. No shortcuts, friendly

That was fast Dean nice fix

Mark Cloonan was an excellent technician.

Bell & Justin were great!

Dean was very knowledgable and patient.

Excellent service