Opens in a new tab
    Free Installation Quotes • Serving the Denver Metro & Northern Colorado

Denver, CO

Heating & Cooling Services in Denver, CO

Installation, repair, and maintenance for Denver homes, rentals, and businesses, from a team a short drive up I-25.
HVAC technician checking refrigerant pressures at an AC condenser beside a red-brick bungalow on a tree-lined street, city skyline in the distance
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 Denver

HVAC Service for Denver Homes and Buildings

Denver’s housing runs from century-old bungalows to new townhomes and multifamily buildings, and Gabe’s experience covers the same range, including large multifamily HVAC jobs in the city.

Older homes often have tight mechanical rooms, aging ductwork, and rooms the original system was never sized for. That’s where a ductless mini-split or a careful furnace replacement can make the biggest difference. Newer buildings need equipment that’s installed to the plans and tested before it runs.

Whatever you have, the visit is the same: we look at the system and the space, test before we guess, explain what we found, and give you options in writing.

What we do in Denver

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

Heat or AC Out in Denver?

Call (720) 701-3810 and tell us what’s happening. We’ll get someone to you as fast as we can.

Call (720) 701-3810
Ductless mini-split mounted in the bedroom of an older home with dark-stained wood window trim
Services in Denver

What We Do in Denver

Here's what we do for Denver homes, rentals, and commercial buildings.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.

Neighborhoods We Cover

We work across the city. These are a few of the neighborhoods we serve.
Why Denver Calls Us

Denver Service Without the Runaround

A small team, a clear process, and the same honest diagnosis on every call.
    Quick to respond
    A same-day response on most calls.
    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.
[PLACEHOLDER: verbatim customer review]
[PLACEHOLDER: verbatim customer review]
[PLACEHOLDER: verbatim customer review]
Visit or Call

Serving Denver 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

Denver HVAC Questions

Common questions from Denver homeowners and businesses.

Do you serve all of Denver?

Yes. We work across the city, from older neighborhoods to new construction.

How fast can you get to me in Denver?

We usually respond the same day on service calls.

Can you add cooling to an older Denver home without ducts?

Often, yes. A ductless mini-split can cool one room or several without new ductwork.

Do you work on rental properties?

Yes, for property owners and managers as well as homeowners.

Do you serve businesses in Denver?

Yes, including commercial maintenance and rooftop equipment.

Denver, CO

Need Heating or Cooling Help

{acf_global_cta_subheading}