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Fort Collins, CO

Heating & Cooling Services in Fort Collins, CO

Installation, repair, and maintenance for Fort Collins and northern Colorado, with the same honest process we use everywhere.
HVAC technician carrying a tool bag across a snowy driveway on a cold morning, snow-dusted foothills to the west
EPA Certified
Refrigerant Handling
OSHA Certified
Safety-Trained Crew
Residential & Commercial
Homes, Offices, Rooftops
Same-Day Response
On Most Calls
Hablamos Español
English & Spanish
HVAC in Fort Collins

Northern Colorado HVAC Service

Fort Collins is at the north end of our service area, along with Loveland, and we treat the drive like any other job: scheduled around you, with a clear plan before we arrive.

We install and repair furnaces, central air, heat pumps, and mini-splits, and we handle commercial service and rooftop equipment for businesses in the area.

Every visit starts the same way. We look at the system and the space, test before we guess, and show you what we found before any work starts.

What we do in Fort Collins

    Furnace and AC installation
    Heating and AC repair
    Mini-splits, heat pumps, and tune-ups

Need HVAC Help in Fort Collins?

Call (720) 701-3810 and tell us what’s happening, and we’ll set a time to come out.

Call (720) 701-3810
Craftsman-style family home in fall with a central air conditioner beside the porch
Services in Fort Collins

What We Do in Fort Collins

Here's what we do for Fort Collins homes and businesses.
HVAC technician kneeling beside a new outdoor AC condenser in a home's side yard, checking that it sits level

AC Installation & Replacement

New central air sized for your home and installed clean. In-home walkthrough, options in writing, and clear pricing across the Denver metro.
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Newly installed white gas furnace with new ductwork and PVC vent pipes in a clean basement utility room, snow in the window well

Furnace & Heating Installation

New furnaces and heating systems for Colorado winters, sized in person and installed clean. Options at every price point across the Denver metro.
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HVAC technician testing an outdoor AC unit's run capacitor with a multimeter at the open electrical panel

Heating & AC Repair

Furnace, AC, heat pump, and thermostat repair across the Denver metro. Step-by-step diagnosis, clear pricing, and usually a same-day response.
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White ductless mini-split mounted high on a sage-green wall above a reading chair and bookshelf, foothills visible through the window

Mini-Splits & Ductless Systems

Wall-mounted and ceiling ductless mini-split installation and repair for Denver-metro homes, additions, and businesses. Call (720) 701-3810.
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HVAC technician rinsing the coil fins of an outdoor AC condenser with a garden hose beside a blooming lilac

HVAC Maintenance & Tune-Ups

Furnace and AC tune-ups, condenser and evaporator coil cleaning, and filter changes for Denver-metro homes and businesses. Call (720) 701-3810.
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HVAC technician kneeling in deep snow to clear ice from a furnace's PVC vent pipes on the side of a home

Emergency HVAC Service

No heat or no AC? Call K&G Builders HVAC at (720) 701-3810 for urgent heating, cooling, and refrigeration service across the Denver metro.
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White heat pump outdoor unit on a raised stand beside a dark gray home, with snow on the ground

Heat Pumps

Heat pump installation, repair, and service for Denver-metro homes. One system for heating and cooling, sized in person. Call (720) 701-3810.
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Technician's hand adjusting a refrigerant manifold gauge set connected to an outdoor AC unit's service ports

Refrigerant, Vacuum & Leak Testing

Refrigerant leak testing, vacuum, repair, and recharge for AC systems, heat pumps, and refrigeration equipment across the Denver metro.
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Mother reading on a sofa while her daughter plays with blocks in a bright, sunlit living room with a wall return-air grille

Indoor Air Quality

UV air purification installation, mechanical-room duct cleaning, and HVAC system sanitizing for Denver-metro homes and businesses.
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HVAC technician servicing a packaged rooftop unit on a commercial roof, Denver skyline and mountains in the distance

Commercial HVAC & Refrigeration

Commercial HVAC service, rooftop equipment maintenance, air handlers, refrigeration, and rough-in installation for Denver-metro buildings.
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Neighborhoods We Cover

We serve Fort Collins and the communities around it.
Why K&G Builders HVAC

Why Fort Collins Calls Us

A small team, a clear process, and the same honest diagnosis on every call.
    Scheduled around you
    We'll set a time that works for you when you call.
    Honest diagnosis
    We show you what we find.
    Real options
    Repair or replace, standard or premium.
    In writing
    Contract on the tablet, copy in your email.
Gabriel Alberto and Carlos David of K&G Builders HVAC in a mechanical room
Our Work

Recent HVAC Projects

Recent work by our own team, from commercial mechanical rooms to ductless mini-splits.
Commercial boiler room with a storage tank, two wall-hung boilers and insulated piping, installed by K&G Builders HVAC
Commercial Mechanical Room Installation
Technician checking a ductless mini-split's air temperature with an infrared thermometer
Ductless Mini-Split Project
Reviews

What Our Customers Say

Most of our work comes from referrals and neighbors. Here's what customers say.
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Serving Fort Collins From Nearby

Nearby Areas We Serve

Based in Thornton, working across the Denver metro and the Front Range. Don't see your city? Call and ask.
FAQ

Fort Collins HVAC Questions

Common questions from Fort Collins homeowners and businesses.

Do you really come to Fort Collins?

Yes. Fort Collins and Loveland are the north end of our service area.

How soon can you get to Fort Collins?

We’ll set a time that works for you when you call.

Is there a trip fee for Fort Collins?

A trip fee applies to repair and diagnostic visits, and we credit it toward the job if you hire us. The fee is [PLACEHOLDER: trip fee amount, and whether it’s higher for Fort Collins].

Do you install heat pumps and mini-splits in Fort Collins?

Yes, along with furnaces and central air.

Do you serve Loveland too?

Yes.

Do you serve businesses in Fort Collins?

Yes, including commercial maintenance and rooftop equipment.

Fort Collins, CO

Need Heating or Cooling Help

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Get a Quote (720) 701-3810