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RESIDENTIAL HVAC · BOULDER COUNTY · 4,980 ft

Furnace and AC Service in Longmont, CO

Longmont has a deep stock of 1960s to 1980s homes with original ductwork in Southmoor Park, Old Town and the west side, plus newer east-side neighborhoods around Ute Creek and Prospect. Boulder County rebates and Longmont Power & Communications programs make heat pumps common here, and LPC’s municipal electric rebates are confirmed on every estimate.

28HVAC jobs completed in Longmont
1.5 hrsaverage response time
6systems installed this year
2five-star reviews from Longmont
CURRENT OFFERS IN LONGMONT

Current coupons for Longmont homeowners.

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HVACExpires Oct 31, 2026$1,500 offA new HVAC system$1,500 off a new furnace, air conditioner or heat pump system, installed.CODE ANNIV1500Claim offerHVAC$8521-point furnace or AC tune-upA 21-point tune-up with a carbon monoxide test.CODE TUNEUP85Book a tune-upFINANCINGUp to 120 moPayments through WisetackProjects up to $25,000. Checking your rate takes a minute and doesn't affect your credit.NO CODE NEEDEDCheck my rate
QUICK FACTS

HVAC in Longmont at a glance.

At 4,980 ft a gas furnace delivers roughly 80% of its rated output, so every system we install in Longmont is sized and adjusted for altitude. Front Range furnaces run six to seven months a year, which is why most Longmont homeowners choose 96% two-stage equipment or a cold-climate heat pump. Longmont’s municipal electric utility runs its own rebates; we confirm them on your estimate. Longmont is served from our Denver office at 1900 S Quince St Unit B with same-day appointments and no trip charges.

Updated October 2026 · prices and rebates are refreshed each quarter.
SERVICE AREA
Longmont, Boulder County
SERVICES
Furnace & AC replacement, repair, tune-ups, heat pumps, maintenance plan
NEW SYSTEM
$8,800 to $18,000 installed, from $96/mo
TUNE-UP
$85, 21-point with CO test
WARRANTY
10-year labor, 10-year parts on qualifying systems
INSTALL SPEED
Next-day available
UTILITY
Xcel Energy (gas and electric)
ELEVATION
4,980 ft · every system sized for altitude
PHONE
1-844-WEL-DONE · 24/7 dispatch
WHAT WE DO HERE

HVAC services in Longmont

Every job is dispatched from our Denver office with same-day appointments and no trip charge.
REPLACEMENTFurnace & AC replacement in LongmontThree written options at a free in-home visit, next-day installs by our own crews. Every system sized for 4,980 ft.Replacement pricing →REPAIRFurnace repairSame-day repair, 4-hour no-heat response, 91% fixed on the first visit.Furnace repair →REPAIRAC repairAll brands, parts on the truck, flat price before work starts.AC repair →HEAT PUMPSCold-climate heat pumpsSized for 4,980 ft, with utility rebates handled.Heat pumps →MAINTENANCETune-ups & Essential Care Club$85 tune-up, or two a year with 15% off repairs from $12/mo.Plans →
WE KNOW LONGMONT

Which Longmont neighborhoods do you serve?

All of Longmont and the surrounding Boulder County area, with most of our work in Old Town Longmont, Southmoor Park, Prospect, Ute Creek, West Longmont, Harvest Junction and Twin Peaks.

  • Old Town Longmont6 jobs
  • Southmoor Park4 jobs
  • Prospect3 jobs
  • Ute Creek3 jobs
  • West Longmont2 jobs
  • Harvest Junction2 jobs
Don't see your neighborhood?We cover all of Longmont and the rest of Boulder County. No trip charge.Call 1-844-WEL-DONE
Furnace + AC replacementOld Town Longmont · 2026
Cold-climate heat pumpSouthmoor Park · 2026
Tune-up visitProspect · 2026
Water heater + furnaceUte Creek · 2026
LONGMONT HVAC QUESTIONS

Costs, rebates and timing in Longmont.

Colorado furnace cost guide →
MOST ASKED

How much does a new furnace cost in Longmont?

Furnace replacements in Longmont run $4,800 to $9,500 installed, and furnace-plus-AC systems $8,800 to $18,000, depending on home size and efficiency tier. EMS sizes for 4,980 ft, prices in writing at a free in-home visit, and offers next-day installs.

Old Town Longmont and Southmoor Park homes usually land in the middle of the range. Utility rebates come off these numbers.

REBATES

Rebates in Longmont

Utility: Xcel Energy (gas and electric).

Rebate amounts change each season and are confirmed on your estimate. We file the paperwork.

Financing options →
TIMING

Typical timing in Longmont

Free estimate
Within 48 hours, usually next day
Replacement install
Next day after approval, 1 day on site
Tune-up
Same week, 45 to 60 minutes
No-heat / no-cool call
On site within 4 hours
Book online →
QUESTION

Does altitude change which furnace I need in Longmont?

Yes. Gas furnaces lose about 4% of output per 1,000 feet, so at 4,980 ft a furnace delivers roughly 80% of its rated heat. We size and adjust for that; installers who skip it leave Longmont homes short on heat.

Lower elevation also means higher summer cooling loads, so AC sizing matters as much as furnace sizing.

QUESTION

Which rebates can Longmont homeowners get?

Longmont is on Xcel Energy for gas and electric, so Xcel furnace, AC and heat pump rebates apply. EMS files the Xcel paperwork for you.

QUESTION

Do you offer same-day furnace repair in Longmont?

Yes. Longmont is on our daily routes from the Denver office, same-day appointments are available, and no-heat calls get a technician on site within 4 hours. No trip charges.

Trucks are stocked with ignitors, flame sensors, capacitors and blower motors for the brands common in Longmont homes, so 91% of repairs are finished on the first visit.

ON EVERY SYSTEM WE INSTALL

Four guarantees, in writing, no fine print.

100% Satisfaction Guarantee

If for any reason you are not 100% satisfied with your new system or installation within the first 90 days, we correct the issue to your complete satisfaction. That’s it, no fine print.

Warranty Guarantee

Every system comes with the manufacturer’s standard warranty, and we add extended labor and parts coverage at no charge to you depending on the system you select. Peace of mind, 100% guaranteed.

Price Match + $100 Guarantee

Show us a written quote from any licensed contractor for a comparable system within 90 days of your installation, and we refund the difference plus $100.

90-Day Performance Guarantee

If the system does not heat or cool your home to the unit’s specifications within the first 90 days after installation, we repair or replace it at no charge to you.

Book Longmont furnace or AC service.

Same-day appointments available. 10-year labor, 10-year parts warranty on qualifying systems.

Essential Maintenance ServicesEssential Maintenance Services · Denver office1900 S Quince St Unit B, Denver, CO 802311-844-WEL-DONE · 24/7 dispatch · Office 7 AM to 7 PM

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