Skip to content
HomeownersProperty Managers
24/7 emergency serviceService areasCareersEmployee login1-844-WEL-DONE
Essential Maintenance ServicesEmergency RepairEmergencyBook Online
RESIDENTIAL HVAC · ADAMS COUNTY · 5,350 ft

Furnace and AC Service in Thornton, CO

Thornton spans 1960s original-city ranches south of 104th to 2010s homes north of 136th, so we are replacing second-generation furnaces in the south and first-generation systems in the north at the same time. Original Thornton and Eastlake homes have small closets and original ducts; North Creek, Heritage Todd Creek and Trailside two-stories usually benefit from zoning or a second system.

45HVAC jobs completed in Thornton
1.0 hrsaverage response time
10systems installed this year
3five-star reviews from Thornton
CURRENT OFFERS IN THORNTON

Current coupons for Thornton homeowners.

All specials →
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 Thornton at a glance.

At 5,350 ft a gas furnace delivers roughly 79% of its rated output, so every system we install in Thornton is sized and adjusted for altitude. Front Range furnaces run six to seven months a year, which is why most Thornton homeowners choose 96% two-stage equipment or a cold-climate heat pump. North Thornton two-stories often benefit from zoning or a second system. Thornton 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
Thornton, Adams 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
5,350 ft · every system sized for altitude
PHONE
1-844-WEL-DONE · 24/7 dispatch
WHAT WE DO HERE

HVAC services in Thornton

Every job is dispatched from our Denver office with same-day appointments and no trip charge.
REPLACEMENTFurnace & AC replacement in ThorntonThree written options at a free in-home visit, next-day installs by our own crews. Every system sized for 5,350 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 5,350 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 THORNTON

Which Thornton neighborhoods do you serve?

All of Thornton and the surrounding Adams County area, with most of our work in Original Thornton, Eastlake, Hunters Glen, North Creek, Heritage Todd Creek, Trailside and Woodglen.

  • Original Thornton9 jobs
  • Eastlake7 jobs
  • Hunters Glen5 jobs
  • North Creek5 jobs
  • Heritage Todd Creek4 jobs
  • Trailside3 jobs
Don't see your neighborhood?We cover all of Thornton and the rest of Adams County. No trip charge.Call 1-844-WEL-DONE
Furnace + AC replacementOriginal Thornton · 2026
Cold-climate heat pumpEastlake · 2026
Tune-up visitHunters Glen · 2026
Water heater + furnaceNorth Creek · 2026
THORNTON HVAC QUESTIONS

Costs, rebates and timing in Thornton.

Colorado furnace cost guide →
MOST ASKED

How much does a new furnace cost in Thornton?

Furnace replacements in Thornton 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 5,350 ft, prices in writing at a free in-home visit, and offers next-day installs.

Original Thornton and Eastlake homes usually land in the middle of the range. Utility rebates come off these numbers.

REBATES

Rebates in Thornton

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 Thornton

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 Thornton?

Yes. Gas furnaces lose about 4% of output per 1,000 feet, so at 5,350 ft a furnace delivers roughly 79% of its rated heat. We size and adjust for that; installers who skip it leave Thornton 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 Thornton homeowners get?

Thornton 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 Thornton?

Yes. Thornton 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 Thornton 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 Thornton 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

NEAREST CITIES WE SERVE

All 54 Colorado cities →