Carroll Mechanical Services
Honesty, Integrity, & Fair Pricing


Proudly Partnered with Carrier
At Carroll Mechanical Services, we are dedicated to providing top-notch residential and commercial HVAC services at reasonable prices. With more than 25 years of experience in heating and cooling solutions, our team of HVAC experts ensures customer satisfaction with every installation and repair. We proudly install Carrier brand HVAC systems and service all other brands, focusing on your comfort and peace of mind.
Our HVAC Services
We offer a comprehensive range of HVAC services tailored to meet your needs, including:

Air Conditioners
Installation and repair of efficient air conditioning systems to keep your space cool during hot months.

Boilers
Reliable boiler installation and maintenance for effective heating solutions, ensuring warmth during winter.

Ductless Mini Splits
Flexible heating and cooling options for homes without ductwork, providing zoned comfort.

Furnace and Heating
Expert installation and repair services for furnaces to create a cozy environment year-round.

Heat Pumps
Energy-efficient heat pumps for both heating and cooling, reducing energy costs and environmental impact.

Humidifiers
Improve indoor air quality with installed humidifiers, enhancing comfort during dry seasons.

Water Heaters
Installation and servicing of water heaters for reliable hot water access at all times.

Other Services
Comprehensive services including gas piping, gas leak detection, thermostat installation, inspections, tune-ups, and more.

About Our HVAC Company
Founded with a commitment to quality, Carroll Mechanical Services has built a reputation as the best HVAC company in Longmont, CO. Our professionally trained and licensed technicians emphasize reliability, courtesy, and thorough communication to answer all your questions. We pride ourselves on our extensive knowledge and dedication to customer service.

Why Partner With Us for Your HVAC Needs?
Choosing Carroll Mechanical Services means you're choosing a team of HVAC experts who prioritize your comfort and satisfaction. Our competitive pricing, expert advice, and comprehensive services make us the ideal partner for your HVAC needs. Don’t just take our word for it – let our satisfied customers share their experiences!
What our customers are saying
Highly Recommend
"I highly recommend this family-owned HVAC business in Longmont! Brien and his crew just replaced our 27-yo gas furnace with a Carrier 95%-efficiency furnace, and we couldn't be happier with their prompt, efficient, and highly-skilled performance. Everybody we dealt with was very personable, and dedicated to doing the very best work for us. Thanks to Lawrence and Zach for doing a great job in a tight crawl-space! A+ business!"
- Tim H.
Solid, Skilled, Courteous, and Dependable
"These guys are great! Solid, skilled, courteous, and dependable. I'm so grateful for the customer service the provide. They stand by their work and go above and beyond. Lawrence, the tech, is amazing! He really knows his stuff and leaves no stone unturned. Brien Carroll is a trustworthy and reliable owner. Nicki and Janis in the office are also on top things, friendly, and helpful. Love this local company!"
- Caitlin H.
Could Have Taken Advantage, But Didn't
"This week, our 19-year-old AC stopped working. We assumed it was done and would need to be replaced. The tech came out and checked it out. He could have easily told us we needed to buy a new unit, but instead, he fixed the small issue for much less. I very much appreciate that he could have taken advantage of us and didn’t. When this old system does need to be replaced, we will definitely have Carroll replace it. Thanks again!"
- Laura W.
Ready to get started?
Carroll Mechanical Services is your trusted partner for all your heating and cooling needs in Longmont, CO. Whether you require installation, repair, or maintenance, we are here to provide reliable solutions tailored to your needs. Contact us today to get started!