Boilers
Boiler Services
Carroll Mechanical Services sells and installs new boilers and offers maintenance and repair services for steam boilers and hot water boilers throughout Longmont and the surrounding community. We also offer flexible maintenance contracts. As the best HVAC company in Longmont, CO, we can service virtually any brand of boiler with professionalism and expertise.
New Boiler Installs
New boiler sales
Low- & high-pressure steam boilers, hot water boilers
Boiler system design for proper sizing and piping
Burner and combustion setup
Piping and ductwork
DA Tanks
Our HVAC services include complete boiler system installations, designed and installed to meet your exact heating needs.
Boiler Repair
Safety inspections
Boiler tube repair/replacement
Welding repairs of cracks or leaks
Repair/replace external piping
Refractory repairs
Boiler feedwater pumps, condensate pumps
We are proud to be part of the Longmont community, providing dependable HVAC services that include boiler system repair and performance optimization.
Boiler Maintenance
Clean boiler & burner
Burner adjustment using a combustion analyzer
Check for proper operation
Arrange a boiler inspection with insurance or the State
Experienced and Trustworthy
Our experienced technicians perform thorough HVAC maintenance to ensure your boiler runs safely and efficiently year-round. As the best HVAC company in Longmont, CO, we are committed to keeping your heating system in top condition.
What our customers are saying
Fast, Reliable, and Friendly
"Fast, reliable, friendly, and honest service at low prices. I highly recommend Carroll Mechanical Services! We have used them at multiple homes in our family in Longmont, CO. Thanks again for another great job on my furnace!"
- Jennifer R.
Went Above and Beyond
"I don't usually take the time to write online reviews, but Brien and his team at Carroll Mechanical Services certainly deserve a special mention. Our townhome needed a new AC unit. While researching replacement options and costs, I ended up speaking with 5 different local companies. I kept getting mixed information - lots of upselling and misleading statements on what would work for our home. All in all, it was a frustrating process. Of all the people I spoke to, Brien, by far, gave me the most peace of mind. Not only did he top everyone in terms of price, but he was very knowledgeable, and his attentiveness and customer service were second-to-none. I had a lot of questions because of the changes in industry standards (Jan. 2023), and he went above and beyond in answering them - even calling me at one point with a Carrier rep on the line to go over the details of the changes and units. He was true to his word - an aptly described "handshake" businessman - and just the fact that I was able to talk to the owner (rather than less knowledgeable employees at other places) was refreshing. I'd highly recommend his services over the bigger outfits in the Longmont area."
- Dan M.
Grateful for CMS
"My house didn’t even have time to get cold this January before I had a completely new system in and running when my old heater went out. I’m just an afternoon all my worries we’re gone and my family nice and cozy again. I’m so grateful to CMS! Don’t bother going through the regular hoops wasting your time with anyone else, just get it done fast and right the first time with CMS."
Ready to get started?
Carroll Mechanical Services of Longmont provides top-quality HVAC equipment, parts, and AC maintenance services 24/7 that you can trust. Whether you’re in need of air conditioner replacement, routine AC maintenance, or a full air conditioner installation, we’re here to keep you comfortable and worry-free — all from the best HVAC company in Longmont, CO.