Furnace & Heating
Furnace & Heating Experts


Carroll Mechanical Services offers Carrier brand new furnace installation for homes and businesses. We also service ALL BRANDS of furnaces, heating systems, and HVAC equipment throughout Longmont and the surrounding community. Our skilled technicians and commitment to reliable service have helped us earn a reputation as the best HVAC company in Longmont, CO.

New Furnace
If you are looking for a new Carrier brand furnace or heating system for your home or office, there are several options from which to choose. Carroll Mechanical Services has extensive experience with furnace installation and heating systems, and we can help you select the furnace that best meets your specific requirements. The size of the space, number of rooms, internal square footage, temperature preferences, and available utility rebate programs all play a role in determining the ideal system.
Whether you're planning a brand-new system or a furnace replacement, we’ll guide you through every step to ensure your comfort and energy efficiency. We are proud to provide comprehensive HVAC services backed by years of experience and customer satisfaction.

Furnace Inspection
We offer a detailed 24-point furnace inspection, followed by professional recommendations for any necessary repairs or adjustments:
Clean and Check Heat Burners
Clean and Check Pilot
Check Flame Baffle
Set Gas Pressure
Check Gas Volume
Set Heat Burner's Air Adjustment
Check Fan Controller
Check Gas Valve
Check Pilot, Thermocouple, and Spark Ignitor
Inspect Combustion Chamber
Check Temperature Rise
Inspect Blower Motor
Inspect Blower Bearings
Inspect Wiring
Inspect Air Filtration System
Inspect Flue
Inspect Limit Control
Inspect Heat Anticipation
Inspect Thermostat
Inspect Amperage and Voltage to Motors
Inspect Safety Interlock Switch
Perform Carbon Monoxide Test
Perform Air Duct Inspection
Advise Customer of Results & Perform Furnace Repairs

Get The Comfort You Need
With cold Colorado winters, the last thing you want is an unreliable heating system. A compromised furnace can be both inconvenient and stressful. At Carroll Mechanical Services, we take pride in providing trustworthy, 24/7 HVAC services to keep your home or business warm and safe.
What our customers are saying
Professional, Honest, and Affordable
"They were all very professional honest and affordable Fred the technician and both gentlemen he brought were great! They even cleaned up and hauled away all the unneeded equipment. Not to mention Janis and Nicole in the office are very knowledgeable and pleasant to talk with and Brian the owner explained everything and made us very comfortable with the services they were providing!!! We will definitely be using them again for all our future needs!"
- JD
Easy To Work With
"I like to support local, family-owned businesses. Carroll Mechanical, and the owner Brien, have been very easy to work with, and taken pains to make sure everything was done right. Installation of high-efficiency furnaces is complex. Make sure you find a good installer that has a lot of experience with the brand. These guys do. Highly recommended!"
- Curt B.
Good Experience and Fair Price
"These guys installed a new furnace and AC in my place three years ago. It was a good experience and what I think is a fair price.What really sets then apart is the service. We just had our board go bad in the AC and it feels like they worked day and night to get us up and running again. Critical for a 100 degree week in June. Seriously-- people at my house 30 minutes after calling. Amazing service."
- JM
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.