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RESIDENTIAL HVAC · WELD / LARIMER COUNTY · 4,820 ft

Furnace and AC Service in Johnstown, CO

Johnstown is mostly post-2000 homes in Thompson River Ranch, Rolling Hills Ranch and the 2534 area, so original furnaces and ACs are now reaching replacement age; builder-grade systems here typically last 15 to 18 years. Old Town Johnstown brings a handful of older homes with small closets.

25HVAC jobs completed in Johnstown
1.7 hrsaverage response time
6systems installed this year
2five-star reviews from Johnstown
CURRENT OFFERS IN JOHNSTOWN

Current coupons for Johnstown 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 Johnstown at a glance.

At 4,820 ft a gas furnace delivers roughly 81% of its rated output, so every system we install in Johnstown is sized and adjusted for altitude. Front Range furnaces run six to seven months a year, which is why most Johnstown homeowners choose 96% two-stage equipment or a cold-climate heat pump. Builder-grade systems in Johnstown typically last 15 to 18 years. Johnstown 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
Johnstown, Weld / Larimer 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
4,820 ft · every system sized for altitude
PHONE
1-844-WEL-DONE · 24/7 dispatch
WHAT WE DO HERE

HVAC services in Johnstown

Every job is dispatched from our Denver office with same-day appointments and no trip charge.
REPLACEMENTFurnace & AC replacement in JohnstownThree written options at a free in-home visit, next-day installs by our own crews. Every system sized for 4,820 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 4,820 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 JOHNSTOWN

Which Johnstown neighborhoods do you serve?

All of Johnstown and the surrounding Weld / Larimer County area, with most of our work in Thompson River Ranch, Rolling Hills Ranch, 2534 area, Old Town Johnstown and Pioneer Ridge.

  • Thompson River Ranch5 jobs
  • Rolling Hills Ranch4 jobs
  • 2534 area3 jobs
  • Old Town Johnstown3 jobs
  • Pioneer Ridge2 jobs
Don't see your neighborhood?We cover all of Johnstown and the rest of Weld / Larimer County. No trip charge.Call 1-844-WEL-DONE
Furnace + AC replacementThompson River Ranch · 2026
Cold-climate heat pumpRolling Hills Ranch · 2026
Tune-up visit2534 area · 2026
Water heater + furnaceOld Town Johnstown · 2026
JOHNSTOWN HVAC QUESTIONS

Costs, rebates and timing in Johnstown.

Colorado furnace cost guide →
MOST ASKED

How much does a new furnace cost in Johnstown?

Furnace replacements in Johnstown 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 4,820 ft, prices in writing at a free in-home visit, and offers next-day installs.

Thompson River Ranch and Rolling Hills Ranch homes usually land in the middle of the range. Utility rebates come off these numbers.

REBATES

Rebates in Johnstown

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 Johnstown

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 Johnstown?

Yes. Gas furnaces lose about 4% of output per 1,000 feet, so at 4,820 ft a furnace delivers roughly 81% of its rated heat. We size and adjust for that; installers who skip it leave Johnstown 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 Johnstown homeowners get?

Johnstown 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 Johnstown?

Yes. Johnstown 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 Johnstown 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 Johnstown 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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