Everyone at Gustafson is super friendly and helpful, including their great technicians. Mike talked me out of getting a more expensive humidifier than I needed, which shows a lot of integrity. I did have an issue with them honoring their coupon, but they made it right. I'd recommend asking for a written quote with any discounts applied in advance just in case, though. read more

Gustafson installed our AC and furnace 14yrs ago and I have had them do their semi-annual maintenance program ever since and have not had any problem with my HVAC system. Every person who has come to do the work has been excellent. Robert tuned up the AC last week and was very thorough, as usual. I highly recommend Gustafson! read more

Absolutely the best. Having worked in design and construction my entire life, I can say without doubt that the furnace and ac install at my house was fantastic. Mike was great to work with from start to finish, and the crew was experienced and professional. The install was very quick and organized. The organized way of the wiring and other HVAC components shows solid workmanship, and this has always been a clue for me during my career while inspecting construction projects in the past. I took many bids for this project, and most fit in a tight grouping that included Gustafson Heating & Conditioning. In honesty it was close between two other companies, but Mike's experience became obvious the more I learned. I definitely made the right choice. read more

I have used Gustafson for several years. They do good work and are pleasant to deal with.

Very professional and friendly service on air conditioner Wednesday AM May 15, 2019. Thoroughly checked over all equipment and made sure A/C unit running efficiently. Updated insulation around air tubing connected to the house. Very pleased with Gustafson service on Air Conditioner and Furnace annually since they did original installation on new house in 2004 Jim H. read more

Robert is the best...he is very knowledgable, thorough, responsive, meticulous and friendly. He takes time to explain how things work and makes sure everything is running effectively and efficiently. I would highly recommend him. He is an asset to Gustafson. A++++++++ read more

My built-in humidifier was not working correctly, and while other companies immediately tried to talk me into a complete (and costly) replacement, Gustafson was able to repair it quickly and inexpensively. It runs like new now! Their service technician, Dillan, was punctual, friendly and he knew how to fix the issue without leaving a mess behind. Great job and highly recommended. read more

Dylan Villano was quick to respond to a broken furnace on a Saturday afternoon in the middle of winter. His communication on scheduling, repair estimates and service was spot on through both phone calls and texts. He was honest and upfront about charges, what was included and repair time estimates. Due to the timing of the repair and the temperatures outside he put my repair at the top of his list. I will definitely be using Dylan and his team for any future repairs for my own home and rental properties. read more

They really know their business. Selling my house and buyer's inspection found the Samsung split system a/c was not working properly. Buyers brought in something Experts or Experts something a/c repair people. The first guy knew nothing about split systems and the second guy knew nothing but pretended he did but said he could not fix. I called Gustafson because I used them before and knew they were Samsung repair folks. Dylan came in and persisted until he figured out I needed a $12 part. Pros not clowns masquerading as experts. read more

My AC unit failed, and Tom got me a good price for a good replacement system, which included installation of smart thermostats. He also came out to my house to help me figure out how to use these Alexa-linked devices. Gustafson installed my original HVAC when my house was built in 2005, and have been inspecting it regularly every 6 months. They are my "go to" HVAC company. read more

Communication was horrible and their customer service was incredibly aggravating. Originally when I called, all the receptionists were busy, so I spoke with a man (didn't get his name) and explained my problem with my baseboard heating system and thermostat. He was very friendly and said they would be able to fix the problem. The receptionist called me back to make an appointment for a few days later. On the day of my appointment, no one ever showed up. I called and the same receptionist said "oh I have you down for an appointment, but it didn't get on the calendar"....so I got rescheduled for the next day between 8-12. She was very harsh on the phone and not apologetic at all. The next day, I rearranged my morning to get my son to school early before the 8am window, and they showed up at 7:30am. They called 20 minutes before arrival, but I was already on my way to my son's school. Thankfully, my husband was still home to meet the technician. By the time I got home, at 7:55am, the technician was already leaving and said "I don't really deal with that sort of thing" after saying there might be air in the pipes leading to the baseboard heat. He blamed the receptionist, saying that she was new and didn't know that my problem was out of their wheel house, but I had already explained the situation to someone else there who seemed knowledgeable about that type of issue. Now, I have to find someone else to do the work after waiting 4 days from when I originally called to fix the problem. I was really hopeful for good service after seeing they had 5 stars on yelp, but was very disappointed. read more

We've been using Gustafson since buying our new home in 2011 and they have always been great to work with. We had an issue with one of our AC units yesterday and I called Gustafson, expected a several day wait, but as always they came through much faster than expected. Robert was here this morning and everything is working like new. read more

The absolute BEST service ever. Family owned. Everybody is super friendly and helpful. As long as I live in CO, they will always be my heating and air company. read more

I couldn't be more pleased with the service I've gotten from Gustafson. Our furnace went out a few weeks ago. I never liked the York furnace we had for 15 years and was happy I could get another Rheem to replace it. Checked online and called several Rheem Pro Distributors. Two didn't call me that day. Gustafson and another company came out right away to give an estimate. I was very impressed with Mike's presentation and bid. We had Gustafson install our new Rheem two days later. Jake and Luis did a wonderful install! Mike was there to check on the work and explain certain things to us. Everything went very smoothly. Mike even figured out how to shift the airflow in a duct to send more heat/air conditioning to the part of the upstairs that had always been (38 years!!) a problem to heat and cool. I can't tell you how wonderful it is to have heat evenly distributed to every room in our house! And the Rheem furnace is terrific. Thank you Mike, Jake and Luis for your excellent work. I would definitely use Gustafson again! read more

I am a Real Estate agent and many of my customers have used Gustafson's. Many times we have short deadlines and Gurstafson's is always very good about getting a tech out to the property ASAP. Lee is amazing, friendly, prompt and informative. They stand behind their work and are competitively priced. I would highly recommend this company. read more

We had a great experience with Gustafson. They were extremely prompt and responsive and serviced our furnace during a snow storm. Great value and trustworthy. I highly recommend them! read more

Gustafson installed a new HVAC system in our home and my husband & I could not be more pleased with the customer service & the work that was done. Their prices were also fair and comparable with other companies. I would definitely use this company again for any of our HVAC needs! read more

Amazing service! I called Gustafson at 7 in the morning after my heater stopped working in the middle of the night. It was 3 degrees out and the forecast was calling for 6 days of the same. I have two young kids and a space heater got us through the night, but was unable to keep up. By the time I got them to school, the house was down to 40 degrees. I expected I would have to call a long list of heating and air companies to find someone to charge me emergency rates to come out the same day, being the first real cold snap of the year. They were my first and last call. I got their number from a sticker on the unit from the original installation, found them to open and answering the phone by 7am, and had an appointment for the same day in no time. They were able to get to my house right on time, diagnose the issue, and pickup and install the part in about an hour. The cost repair was very reasonable with no surprise "extras" The house was warm by the time the kids were out of school and we have been comfortable in the recent sub-zero nights. read more

Lee & all staff (especially Luz) are extremely responsive & go above & beyond to be professional and courteous. I've had 3 service calls in the past 3 months (a new build house - all different unexpected scenarios) & they've consistently assisted & resolved the issue on the first trip. Really appreciate their professionalism & top notch attitude. read more

Central air decided to conk out right before we left town. Called three different providers at 7am--one never returned my call, one could come at 4:30, but would have to charge me double time portal to portal (so I would be paying for his commute home), and finally Tom said he could come out that morning. He came, had the part (I diagnosed it ahead of time), and had it fixed in about 15 minutes. Great experience. read more

We needed a new hot water heater and I "wanted" to upgrade my furnace. After taking more than two weeks to answer my questions regarding hot water heaters these guys finally admitted to me that they were not in the hot water heating business, only the furnace installation business. Even though they claim to be Pro Dealer for Rheem they new nothing about the Rheem line up of hot water heaters. Thanks goodness our hot water heater is still limping along and I did not need an immediate replacement or I would have ended up with the wrong heater for our needs. read more

Robert arrived right on time.  He was friendly and easy to get along with.  He solved our furnace problems, explained why they happened and how to avoid them in the future.  Seemed highly knowledgeable and willing to share information with me.  I felt confident in his work. read more

We were in a time crunch to have a furnace, AC and humidifier serviced and Gustafson was able to send someone right away. Robert Gomez came early in the morning and serviced both the furnace and humidifier efficiently and took time to walk me through all that he did and how both units operated. Was very pleased. However, due to the colder weather that morning, he would not have been able to satisfactorily service the AC unit so we scheduled another day do complete this. Luckily for me, the weather warmed up beautifully that day and Robert found himself near our property late in the day. Knowing I needed this done quickly, he called to see if he could swing back by the same day to complete the job! When has a vendor ever reached out to do something unexpected such as this? After a long day, I would have wanted to go home! Not Robert, he came back by the house, serviced the AC unit and was on his way. I will definitely use Gustafson for all future AC and Heating needs. read more