Serving Thornton from Lafayette
Thornton started in 1953 as a planned community of single-story brick ranch houses for veterans, and grew into a city of more than 140,000. We work on the original homes and the new ones.
Thornton is the biggest city we serve, about 142,000 people at the 2020 census. It began in 1953, when Sam Hoffman laid out what Wikipedia calls the first fully planned community in Adams County, and it was incorporated in 1956.
We repair and replace furnaces, air conditioners, water heaters and swamp coolers all over Thornton, with the same family service and posted prices we offer everywhere.
The original Thornton was built for World War II veterans: Hoffman started with 300 single-story ranch houses, and three-bedroom brick homes sold for under $10,000. Those homes are now more than 70 years old, and most are on their third or fourth furnace, often with central air added long after they were built.
The city’s biggest boom came in the 1970s, when it more than tripled from about 13,000 people to 42,000, and growth stayed strong through the 2000s on the north side. That means a lot of systems from the 1970s, 80s and 90s are near the end of the road, and many from the early 2000s are getting there. Most gas furnaces last somewhere around 15 to 20 years and most central air conditioners around 12 to 15, depending on how they were installed and cared for.
Newer homes up north mostly have high-efficiency condensing furnaces with PVC venting and a condensate drain. A frozen drain or a snow-blocked intake is a common cause of no heat in a cold snap, and usually a quick fix.
Common heating and cooling calls in Thornton, and where to start.
For the 1970s to 90s systems near the end of the road. Free estimates on new systems.
Get an honest answerThornton requires a mechanical permit to replace or alter a furnace, air conditioner or evaporative cooler, and a plumbing permit for water heaters. Like-for-like furnace, AC and water heater replacements are issued without plan review. Contractors need a City of Thornton contractor license, and the city checks it when the permit is pulled.
Thornton is split between two utilities. Depending on your location, electric and gas service comes from Xcel Energy or United Power, and that decides which rebates you can use for a heat pump or efficient equipment. Amounts change, so check the program or our rebates page.
We work all over Thornton, including:
Same prices in Thornton as everywhere we work. No trip charge games for being a few miles further out.
| Service | Price | Details |
|---|---|---|
| Furnace Repair | $89 trip/diagnostic fee | $89 diagnostic/trip fee that is waived with a repair. Let's get you warm again! |
| AC Repair | $89 trip/diagnostic fee | $89 trip/diagnostic fee that will be waived if you choose to go ahead with the repair. The repair price will depend on the specific service needed. |
| Boiler Repair | $89 trip/diagnostic fee | Diagnostic/trip fee of $89, waived if you go with the repair. Let's get your heat up and running! |
| Water Heater Repair | $89 trip/diagnostic fee | Diagnostic/trip fee waived if you go with the repair. Let us know what's going on with your water heater. |
| Furnace Inspection | $189 per system | 10-point furnace inspection. Let us know if you have more than one system. No Saturday appointments. |
| AC Inspection | $189 per system | Air conditioner system 10-point inspection checklist. It should be at least 67 degrees at the time of the inspection so the technician can accurately check your AC's refrigerant levels. |
| AC & Furnace Inspection Combination / Annual Service | $250 | Monday through Thursday only. 10-point checklist of each, including recommendations (if any). Checking the health of your AC and furnace and cleaning parts that typically get dirty. Save $128 by booking them together. May and September are the best months for this. |
| Evaporative Cooler Start-Up | $229 | Seasonal start-up for your evaporative cooler. We will not allow our technicians to climb onto wet roofs, into high winds or during a lightning storm, for their safety. |
| Estimate for a new furnace, AC, mini-split or heat pump | Free | Free estimate. Let us know which you are interested in getting a free estimate on, and we will be happy to send a technician your way. |
Prices as posted on our online request form. Request any of these online or call 303-464-7000.
October 2026
Great air conditioning process and execution. Showed up, assessed, and priced. No “cooling associate” follow-up needed like 2 other companies; this company cut to the chase. They gave the most competitive price and Charlie and Ian were thorough and worked hard on my install. Highly recommend.
October 2026
Really friendly, considerate people and great work from start to finish—scheduling an estimate all the way through installation. They explained everything and really showed that they cared about my questions and my satisfaction. Our new heat pump and furnace are great.
August 2026
Sam was professional and knowledgeable about my A/C & furnace. He patiently address all my questions. I understand that state of my equipment better and have expectations for when additional services and replacements are likely needed.
August 2026
Very satisfied with our experience with Aspen Creek. Sam came out to evaluate our A/C system after another company in the area told us we needed a replacement part that would cost thousands of dollars. Sam took the time to thoroughly assess the system and let us know that the part was actually functioning properly and did not need to be replaced. He also gave us some helpful recommendations for improvements that could genuinely make a difference with our A/C performance, while being clear that they weren’t urgent or things we needed to spend money on immediately. We really appreciated his honesty, expertise, and straightforward approach. It was refreshing to work with someone we felt we could trust.
July 2026
They are always Top Notch!!! They only fix what is actually broken and if the time comes, they do amazing full replacements.
July 2026
I can not say enough about my positive experience with Aspen Creek and the installation of my heat pump to replace my very old A/C. From the office staff Shannon and Danni helping me with my scheduling conflicts, to Sam giving my estimate and answering questions, and Charlie, Toby and Trevor coordinating the install, everyone was knowledgeable, professional, and friendly. Trevor was my HERO and made sure I understood my new system, showed me how to work everything and told me some things to watch for. It feels good knowing things were done correctly and I feel confident should I have any questions or issues, I am in good hands! Thank you Aspen Creek, I'll sleep well tonight in my cool house! 🤣
July 2026
We had Dan and Toby install a mini-split in our bedroom because our central air wasn't keeping the second floor room cool enough during the summer. The whole office was great to work with and they did an excellent job with communication and the install. There were a lot of twists and turns getting the lines routed down to the compressor/condenser and they did a great job of keeping it as clean and tucked away as possible. I highly recommend Aspen Creek.
July 2026
My family and I chose Aspen Creek Heating & Air after getting quotes from 8 other HVAC companies. They were transparent with pricing and happy to walk us through every aspect of the system that we'd be purchasing and why it would be great for our home. The other companies were pushy and somewhat condescending for the most part, along with being significantly more expensive. Moreover; the tremendous service from start to finish from the wonderful folks at Aspen Creek made this important and expensive capital home improvement, the ABSOLUTELY perfect choice for my family. Aspen Creek was even so gracious as to provide us with (2) temporary A/C units after our compressor died one day after accepting their bid. That was for almost 3 weeks! Now, that is service. I've spent my entire career in Customer Service and know good from bad in that industry, and Aspen Creek Heating & Air will do very well by you. So much so, that my nephew chose Aspen Creek after hearing of my wonderful experience with them when his old system failed, one day after my installation. Top notch products, service, and even better people is what you get with Aspen Creek Heating & Air!
July 2026
This is a family owned business that treat you with so much care! I had to get my old air conditioner replaced. When Dan arrived, he went through explaining everything. He also found a few things that weren’t done the best from before. They delivered a cooling unit to my house until they could install my new unit. When they came to install it, they were professional, clean and efficient. From beginning to end, they have gone above and beyond.
Yes. Thornton requires a mechanical permit to replace a furnace, air conditioner or evaporative cooler and a plumbing permit for a water heater. Like-for-like replacements are issued without plan review, and the contractor needs a City of Thornton license.
It depends on your location. Thornton is served by both, and the city publishes a utility service area map. Your bill will tell you, and it decides which rebates apply.
Usually, yes. The question is the ductwork. We will look at what you have and give you a free estimate on the options, including a ductless mini-split or a heat pump.
The same as everywhere we work. Repairs start with an $89 trip and diagnostic fee, waived if you go ahead with the repair.
Call the Nevin family or request service online. We will tell you straight what it needs.
Monday to Friday, 7am to 5pm · Send us a message
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