Top HVAC Companies In Longmont For 2027

Longmont sits where Boulder County meets the plains, with older homes near downtown and fast-growing neighborhoods to the east, and it gets the same hard water and freeze-thaw swings as the rest of the Front Range.

Below are 5 HVAC companies that are based in or near Longmont, including firms from Boulder and Loveland, with a short note on where each one fits best.

Longmont HVAC Companies At A Glance

Company	Base	Distance	Known For
Colorado Green Plumbing, Heating and Cooling	Longmont	In Longmont	Heating, cooling, plumbing
Mountain Valley Plumbing and Heating	Longmont	In Longmont	Heating, cooling
Save Home Heat	Boulder	About 14 miles	Heating, cooling, plumbing
Canyon Plumbing and Heating	Boulder	About 14 miles	Boilers, heating, evaporative coolers
JT Plumbing Heating and Air	Loveland	About 16 miles	Heating, AC, plumbing

2 of the 5 companies here are based in Longmont itself and 3 come from further out. The nearest outside Longmont is Save Home Heat in Boulder, about 14 miles away.

Best HVAC Companies In Longmont

1. Colorado Green Plumbing, Heating and Cooling: Longmont Family Business For Heating And Cooling

Colorado Green handles heating and cooling as well as plumbing for Longmont homeowners, drawing on more than four decades in the area.

Because it works out of Longmont, Colorado Green is a natural first call for repairs, tune-ups and full system replacements.

2. Mountain Valley Plumbing and Heating: Heating And Cooling Across Northern Colorado Since 2007

Mountain Valley’s heating and cooling team works out of Longmont and covers the surrounding Northern Colorado towns.

Because it works out of Longmont, Mountain Valley is a natural first call for no-heat calls in winter and AC repairs in summer.

3. Save Home Heat: Plumbing, Heating And Cooling Since 1979

Save Home Heat provides heating and air conditioning service in Boulder along with plumbing, under one long-running local company.

From Boulder, roughly 14 miles from Longmont, Save Home Heat serves homeowners across the region for seasonal maintenance and equipment upgrades.

4. Canyon Plumbing and Heating: Boiler And Hydronic Heating Specialist

Canyon is a good fit for Boulder homes with boilers and hydronic heat, and it also services evaporative coolers.

Canyon is based in Boulder, about 14 miles away, but covers a wide area, and it is worth a call in Longmont for repairs, tune-ups and full system replacements.

5. JT Plumbing Heating and Air: Local Heating And Air Team Built For Northern Colorado

JT handles heating and air conditioning along with plumbing in Greeley, and its Loveland base means shorter drive times across Larimer and Weld counties.

JT Plumbing works out of Loveland, around 16 miles away, and is a good option in Longmont for no-heat calls in winter and AC repairs in summer, especially if closer firms are booked.

How To Choose An HVAC Company In Longmont

What is the after-hours rate?

Emergency rates vary widely. Ask before the technician is dispatched.

Do they offer maintenance plans?

A spring tune-up catches most problems before the first heat wave.

Is the technician trained on high-altitude equipment?

Furnaces at 5,280 feet need correct gas pressure and combustion settings. Ask whether the technician checks combustion during the repair.

What is the diagnostic fee?

Ask whether it is credited toward the repair.

Conclusion

Colorado Green Plumbing, Heating and Cooling and Mountain Valley Plumbing and Heating are the closest picks for many Longmont homes, while Save Home Heat is also worth a call, especially for seasonal maintenance and equipment upgrades. Whichever company you choose, check credentials, ask for a written quote and compare two or three options before you commit.