Reviews of local pros in Boulder, Colorado

I contacted this company when my old heater stopped working during a cold weekend. I was out of town and worried about my house freezing up, but after a neighbor recommended them, I gave them a call. Justin and his team really understood my situation and quickly got to work, so I didn’t have to stress while I was away. When I got back, I saw that they were already installing a new, energy-efficient heater. The whole process was done with a lot of care and skill. Jeffery, the technician who handled most of the repair, was fantastic. He was always on time, kept a positive attitude, and made sure to communicate with me about every step of the job. Even when he had to work in tight spaces like my attic, he didn’t complain and made sure my property and pets were respected—he even let me know before using any loud tools so I could move my dogs. When he finished, everything was cleaned up perfectly. Thanks to their great service, my new heater works quietly and my energy bills have already gone down. I’m very happy with the experience and wouldn’t hesitate to use them again for any heater repair or replacement needs.

If you need AC repair or HVAC work, this team is the one to call. They recently replaced our air conditioner, furnace, and humidifier, and their attention to detail and skill were outstanding. Because they have a small crew, they really take the time to make sure everything is installed correctly and runs smoothly. The work was finished right on schedule and within the budget we discussed, and our system is working perfectly. Our third floor now stays cool, even when the temperatures are high, and we’re looking forward to saving money on our energy bills. Paul is extremely knowledgeable and only brings in other experts. Micah led the project at our home and did a fantastic job. Highly recommend reaching out to them for your next AC repair or HVAC project.

as a recently retired home inspector, i've worked with many hvac companies over the years, but comfort zone heating & air conditioning stands out for their furnace repair service in boulder. when one of my tenants called about a furnace that had stopped working, i tried to troubleshoot it myself but realized it needed a professional. i contacted their after hours line and got a quick call back from duane, who arrived in less than an hour. he had the right part with him and fixed the furnace right away, so my tenant didn't have to go without heat. duane even brought along some portable heaters just in case the repair took longer, which really showed he cared about keeping us comfortable. i always recommend this team to friends, family, and anyone needing reliable furnace repairs.

From my first phone call to the moment our HVAC system was fixed, everything went really smoothly. We called over the weekend and were able to schedule a visit for Monday, which worked great for us. Our technician, Justin, was fantastic. He took the time to explain the issues with our air conditioning unit, answered all our questions, and made sure we understood what was happening. Our AC was running but wasn’t blowing out cold air. Justin found that the condensation drain inside wasn’t working right and also discovered a refrigerant leak at the valve outside. He repaired the inside drain, fixed the freon valve leak, and recharged the system with more refrigerant. Now our air conditioner is cooling our home in Boulder just like it should. The whole team was friendly and professional. We really appreciate how they took care of us, and we’ll definitely call them again for any HVAC repairs or upgrades. Highly recommend!

We needed help with our very old AC unit that hadn’t been replaced since the house was built. Our contractor recommended Comfort Zone Heating & Air Conditioning, saying they were the experts for this kind of job. He was right! Micah was professional, honest, and always on time. He had to take out the huge, outdated system and install a new, energy-efficient AC. Even with a tight schedule during the holidays, the work was finished quickly, and special care was taken to leave us with a reliable, much smaller system that works great. We are very happy with the service and would definitely recommend them for AC repair and replacement.

We got quotes from several contractors for furnace repair and installation for our multi-unit building. Out of all of them, this company gave the most detailed and professional proposal, especially when it came to dealing with some units that were far from the main furnace area. Our technician, Craig, clearly had a lot of experience and made good recommendations. The team finished the furnace installation in about a week and made sure to clean up thoroughly every day. As an authorized dealer, they were able to offer a longer warranty on the furnace compared to other companies. Their price was on the higher end, but it was definitely worth it for the quality of service and the reliable furnace system they provided, which was just right for our needs here in Colorado. We were so happy with the whole process that we chose them again to install another furnace system for our rental unit.

After my furnace stopped working, I called Comfort Zone Heating & Air Conditioning to find out what was wrong. Jeffery came out and did a careful inspection, starting with the thermostat, then checking both the furnace unit in the attic and the one outside. He discovered that the capacitor was only partially holding a charge and explained what that meant in simple terms. Even though the old capacitor had some life left, Jeffery gave it a little boost to get the furnace running, but it made some loud noises, and he let me know that the compressor might need to be replaced soon. He was very honest and only charged me a basic trip fee for his visit, which I appreciated. The whole experience was straightforward, and I felt comfortable with the service and the explanations I got. I’m glad I called them for my furnace repair, especially during the cold Colorado weather. I’ll definitely call again if I need any more furnace or heating work in the future.

A few days ago, my furnace stopped working and I reached out to Comfort Zone Heating & Air Conditioning in Boulder. Andrew, the repair technician, arrived the same day and quickly figured out what was wrong. After many years of use, it turned out my old furnace needed to be replaced. Andrew arranged for a new unit, and then Micah and Tristan came to handle the installation. They were fantastic—very professional and clearly experienced with furnace installation. The team made sure everything was spotless afterward and took time to explain each part of the process to me so I felt comfortable with the new system. Their prices were fair and honest, and the quality of work was excellent. I highly recommend them for any furnace repair or installation needs!

Ruben, Justin, and Duane were fantastic every step of the way. I want to share how great my experience was so others know how reliable and professional their team is. My husband and I recently moved into a new house, and we needed to update both the furnace and air conditioning. Since our heating uses baseboards, I was careful to look at different options. I got three estimates, but the first two companies kept trying to talk me into a heat pump, even though I said I wasn’t interested. Ruben was the first person who really listened and didn’t push for something I didn’t want. He responded quickly to all my emails and even made a second trip to make sure I understood the estimates and could answer all my questions. Justin and Duane did the installation of the new HVAC systems. They were always on time, friendly, and respectful. Our dogs like to hang out in the garage, which is also where our furnace is, and both installers were very accommodating—making sure their tools were safely put away so the dogs could be out when they left for the day. They even noticed a few parts of the AC system that could use an upgrade and took care of it without charging us extra, just to make sure everything was done perfectly. They went above and beyond by doing something really thoughtful for my husband while he was away. The furnace room looks incredible—like a real professional job. I wouldn’t hesitate to recommend Comfort Zone Heating & Air Conditioning to anyone. I don’t plan to use any other HVAC service after this experience. Everyone was wonderful to work with and truly kind.

tristan and his coworker handled the heater repair and installation at our home in boulder. they did an excellent job and worked hard to get everything set up properly. even when a few surprises came up during the process, they found good ways to fix the problems. they were very helpful and took the time to answer my questions about how the heater works. once the job was finished, they cleaned up the area really well and showed me how to operate the new system. great service, strong technical knowledge, and impressive attention to detail. i highly recommend their team for any heater repair or installation needs.

We had a great experience with our heater repair! From the moment we called about our old heater not keeping up with the cold, the team was friendly and professional. Craig came out first to check our older heating unit and was able to fix it enough to keep us warm until they could get a new one ordered. When the new heater arrived, the crew handled the replacement and installation carefully, making sure everything was done right. They explained how the new system worked and answered all our questions. We really appreciate their attention to detail and would highly recommend their heater repair and installation services to anyone needing help with heating.

honest, trustworthy, and really know what they are doing. paul was fast and efficient when he came to fix my heater. he made sure to wear a mask when he arrived, which i appreciated. the first time i needed help, paul figured out that my new heat pump and furnace had been mis-wired and were low on freon. he got everything working right again. when my older furnace stopped working, i called them back. once again, paul found the issue quickly and had my heat running in about 30 minutes. their prices are fair, and the service is great. i highly recommend them for heater repair, especially when colorado winters get cold.

I called for AC repair when my Nest thermostat suddenly went blank. After checking online for possible issues, I decided to reach out for professional help. They sent out a friendly technician named Paul, who quickly diagnosed the problem and explained what needed to be fixed. Paul gave me a clear quote for the replacement part and let me know it would take a few days for the part to arrive. I got a follow-up call to schedule the next appointment, and Paul returned to install the new part right on time. He was very personable and made sure I understood exactly what was being replaced. Overall, the service was excellent and I highly recommend them for any AC repair needs in Colorado.

After searching for a while to find an AC repair company with fair prices and strong reviews, a friend suggested Comfort Zone Heating & Air Conditioning in Boulder. I checked them out online and saw they had lots of positive feedback and reasonable rates, so I booked an appointment for the following week. When the day came, Craig and Micah showed up right on time and were very friendly. They got started with the repair work right away and finished quickly, making the whole process easy and stress-free. The final bill matched the quote I was given, so there were no surprises. Since the service, my air conditioning has been working perfectly, keeping my home cool and comfortable during the hot Boulder summer. I’m really happy with the results and the great service I received.

When we needed to repair our heater, we got quotes from several companies. Out of all of them, this team stood out as the most honest and straightforward, and their pricing was very fair. We were very happy with our choice. The technicians were always on time, worked carefully, and were flexible when we had to make changes to our heating system. They explained how our heater worked, answered all our questions, and gave us helpful tips on regular maintenance. Now, whenever we need any heater repairs or have questions about our heating system, we know exactly who to call. We really trust this company and highly recommend them for anyone needing heater repair in Colorado.

When our old AC system from 1981 stopped working right as the Boulder weather started to heat up, we knew it was time for an upgrade. We’d also had some issues with the furnace over the winter, so we decided to get everything checked out and replaced at once. After a family member recommended Comfort Zone Heating & Air Conditioning, we reached out and were happy with how quickly everything moved—less than a week from our first call to a full system installation. The crew, including Justin and Ruben, was great to work with. They handled all the tricky parts, like enlarging the attic access and adding extra support for the new HVAC equipment. They also removed old, outdated parts and made sure the access looked just like it did before they started. The whole job, including new AC, furnace, and thermostat, took just one day. They even hauled away all the old equipment and cleaned up, so we didn’t have to lift a finger. Everyone on the team was friendly and respectful. When a small technical issue came up, they fixed it right away without any hassle. The price was exactly what we were quoted, with no surprise fees. While I joked about wanting a forty-year warranty like our old system lasted, I know that’s not really realistic. Overall, we’re really happy with the service and our new, reliable HVAC setup.

I have been a customer of Comfort Zone Heating & Air Conditioning for a while now, and every experience has been great. When my heater needed repair, I called them and was impressed by how knowledgeable and honest everyone was. They never tried to push extra services or parts I didn’t need, which made me trust them even more. When I called to schedule a heater repair, Ruben was the one who came out. He arrived right on time and started by checking everything thoroughly, even going up into the attic to make sure he didn’t miss any issues. After a careful inspection, Ruben explained that there was a restriction in the system and recommended we address it before it caused more problems. I really appreciated how he took the time to talk with me and answer all my questions, making me feel comfortable and informed throughout the process. Later, I spoke with Jeffery about possibly upgrading to a new heating unit. He gave me clear, helpful advice about the different options, and I felt he genuinely cared about helping me find the right fit for my home. Since the new unit was installed, I haven’t had to adjust the thermostat at all—the house stays perfectly warm, even during those cold Colorado nights. The whole team did an excellent job from start to finish. I’m really happy with my new heater, and I wouldn’t go anywhere else for heating or repair needs. Highly recommend!

I was looking for someone to handle my AC repair and installation in Boulder, and this team stood out among the four contractors I considered. Paul and his crew gave me a straightforward quote with no hidden fees, and their pricing was very fair. They finished the entire job in just one day, which was much faster than I expected. The quality of their work was excellent—everything was done cleanly and professionally. Paul even returned to fix a small issue with a fan that was making a slight noise, showing real attention to detail. I really appreciate how much they care about doing the job right, and I would highly recommend their AC repair services to anyone in Boulder.

What impressed me most about this HVAC company was how the entire team worked together so smoothly from beginning to end. Justin was both professional and polite, and with some support from a quick call to a senior technician, he was able to figure out the issue with my heat pump. The next day, Jeffery came out to run an extra test, and his findings really helped me decide whether to repair or replace my system. After that, Jeffery visited to discuss my options. He listened carefully, explained everything clearly, was very friendly and thorough, and provided me with several quotes to choose from. The installation crew, led by Micah and his team, arrived right on schedule. They were courteous and professional the whole time, even though the job turned out to be more complicated than expected. The crew combined their expertise to solve every issue and completed the work efficiently. I felt comfortable having them in my Boulder home and am very satisfied with the results. I will definitely recommend this HVAC service to others in the area.

As winter was approaching in Boulder, we decided it was time to replace our old furnace, which had been running for about 20 years. We also thought it would be a good idea to add central AC during the upgrade. After hearing positive feedback from friends and checking out another company, we chose Comfort Zone Heating & Air Conditioning for the job. Ruben was the technician who came out to help us. He was very friendly and clearly knew a lot about heater repair and installation. He explained everything in a way that made sense and never tried to push us into getting more than what our home actually needed. The price he gave us felt fair, especially considering today's costs. The installation process went smoothly and Ruben made sure to clean up everything before leaving. We are really happy with our new furnace and the entire experience. I would definitely recommend their heater repair and installation services to anyone in Boulder.

I picked Comfort Zone Heating & Air Conditioning after seeing all the positive reviews online. Since I just moved into my house in Boulder, I wanted to make sure my heater was working well before the cold weather arrived. I also bought a new thermostat and needed someone to install it. I had called another place first, but they said they couldn’t come out for over a month, which wasn’t going to work for me. Thankfully, I found this company, and they were able to schedule me just two days later. Tristan came by and made me feel confident that my furnace was in good hands. The whole experience was easy and stress-free.