HVAC Services in Longmont
Reliable HVAC service across Longmont — from historic Old Town to Prospect New Town and the rapidly growing southwest. Same-day repair available.
Trusted HVAC Service in Longmont
Longmont’s mix of historic homes from the 1880s, mid-century ranch homes, and modern infill development means our techs see everything from steam radiators to ductless mini-splits — sometimes in the same week. We bring decades of HVAC expertise across all eras.
With St. Vrain Creek floodplain considerations in some neighborhoods and stronger wind exposure on the prairie east of town, Longmont presents specific HVAC challenges that we know how to solve.
Local Climate Note
Longmont sits at 4,979 ft with St. Vrain Creek floodplain in lower neighborhoods. Eastern Longmont gets significant wind exposure — we recommend sealed-combustion equipment.
Neighborhoods We Serve
Old Town Longmont, Prospect New Town, Southmoor Park, Northwoods, Fox Hill, Renaissance, Twin Peaks, Lake Park
Why Longmont Homeowners Choose MrFixer
Experience across 140+ years of housing stock
Old Town historic-home expertise
Same-day service for emergency calls
Local crew familiar with Longmont code requirements
HVAC Services Available in Longmont
All our services are available with same-day or next-day scheduling in Longmont.
Air Conditioning Installation
Professional AC system installation for homes and businesses.
Learn moreFurnace Installation
Expert furnace installation for Colorado winters.
Learn moreHeat Pump Installation
Energy-efficient heat pumps for year-round comfort.
Learn moreDuctless Mini-Split Installation
Flexible mini-split systems for any space.
Learn moreThermostat Installation & Upgrades
Smart and programmable thermostat installation.
Learn moreNew Construction HVAC Systems
Complete HVAC design and install for new builds.
Learn moreFAQs about HVAC in Longmont
Common questions from Longmont homeowners.
Do you handle old steam-heat homes in Old Town?
Yes — we maintain, repair, and (when desired) modernize older steam and hot-water systems found in Old Town Longmont. We can also retrofit forced-air or hybrid systems.
What about new builds in southwest Longmont?
We do new-construction commissioning, warranty work, and tune-ups for all major Front Range builder partnerships in the SW Longmont growth corridor.
Are you licensed in Longmont?
Yes — Boulder County and City of Longmont licensed, EPA-certified, fully insured. We pull permits for all installations.
How quickly can you arrive for emergencies?
Most Longmont emergency calls get a tech on-site within 60-90 minutes. We have a Boulder-County–based crew dedicated to the area.
Do you offer maintenance plans?
Yes — annual two-visit plans that include a spring AC tune-up and fall furnace tune-up, plus priority emergency dispatch. Call for current plan pricing.
Our Recent HVAC Work in Longmont
Real installations, repairs, and tune-ups across Longmont. Quality work, every job.
Also Serving Across Colorado
Same trusted HVAC service throughout the Front Range.
Our Professionalism Is Reflected in Our Customer's Feedback.
Don't just take our word for it — hear from Colorado homeowners who trust us with their comfort.
"MrFixer installed our new furnace right before the cold snap. Professional, on time, and incredibly fair pricing. Our home has never been warmer!"
"Called at 11pm with a broken AC in July. They were at our door within an hour. Fixed it fast. Cannot recommend enough for emergency repairs."
"Replaced our 17-year-old AC and added a smart thermostat. The crew showed up exactly on time, walked us through every option without pressure, and finished a full install in one day. Energy bill dropped 30% in the first month. Couldnt be happier."
"We have used MrFixer for annual maintenance for 3 years now. Always thorough, always honest. They found an issue last year that saved us thousands."
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