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Ductless Mini-Split Installation in Highlands Ranch, CO
Heating and cooling for rooms the ducts don't reach.
- HVAC diagnostic: $99.95
- Price before any work starts
- Written guarantees
Ductless Mini-Split Installation in Highlands Ranch
Summit Heating, A/C, Plumbing & Electrical installs ductless mini-split systems for homeowners across Highlands Ranch. A mini-split is a heat pump with a compact outdoor unit and one or more wall units inside, joined by a small line set instead of ducts. It’s for the bonus room over the garage that’s always hot, a finished basement, an addition, or a home that never had central air. We don’t build ductwork, so for rooms without ducts, this is the job we do.
Call (720) 870-1580 to schedule an estimate. If an existing mini-split has stopped working, the visit starts as an HVAC diagnostic: $99.95. Your technician reviews the estimate with you, and you can approve it on the spot or later through a link.
Call (720) 870-1580 to schedule an estimate. If an existing mini-split has stopped working, the visit starts as an HVAC diagnostic: $99.95. Your technician reviews the estimate with you, and you can approve it on the spot or later through a link.
When a Ductless Mini-Split Is the Right Fit for a Room
A room the central system doesn't reach well
A whole house already served well by ducts
An addition, garage conversion or finished basement
A home where the furnace and AC just need repair
A house with no ducts at all
A space you want to cool once a summer
Wanting heat and cooling in one quiet unit
What's Included in Your Mini-Split Installation
- Your technician sizes the system to the room or zones and picks wall unit locations with you.
- Your technician reviews the written estimate. Approve on the spot or later from the link.
- We file the Douglas County permit.
- We mount the outdoor and indoor units, run the line set and the electrical supply with code-required GFCI protection, and start the system.
- We show you the controls and clean up. The county inspects the finished work.
Mini-Split SEER2 and HSPF2 Ratings and Our Credentials
A mini-split is a heat pump. New split heat pumps in the federal North region, which includes Colorado, must reach 14.3 SEER2 and 7.5 HSPF2. Many ductless models are rated higher, and your estimate shows the rating of each option.
Our credentials: Lennox Premier Dealer, Lennox Centurion Award, Mitsubishi Diamond Contractor, and NATE-certified technicians.
Our credentials: Lennox Premier Dealer, Lennox Centurion Award, Mitsubishi Diamond Contractor, and NATE-certified technicians.
Douglas County Permits for Mini-Split Installation
Highlands Ranch is unincorporated Douglas County, so permits come from the Douglas County Building Division in Castle Rock. Mechanical permits go through the county’s online e-permits system. If a mini-split replaces gas heat entirely, that’s a gas-to-electric conversion, which needs a plan review and is filed in person, by fax or by mail. The county has worked under the 2024 International codes since July 1, 2026, and uses the 2023 NEC until a newer edition takes effect Jan 1, 2027. (Douglas County, checked Nov 2026.)
We install mini-splits across Highlands Ranch, from bonus rooms in BackCountry near Mountain Vista High School to basements in the 80129 area near Plum Valley Park.
We install mini-splits across Highlands Ranch, from bonus rooms in BackCountry near Mountain Vista High School to basements in the 80129 area near Plum Valley Park.
Mini-Split Installation Cost Factors in Highlands Ranch
- Number of indoor units and rooms
- System size and efficiency
- Line set length and wall unit locations
- Electrical supply and GFCI protection
- The Douglas County permit and inspection
Our Written Guarantees on Every Mini-Split Install
Google Reviews of Summit Heating, A/C, Plumbing & Electrical
Summit holds a 4.7 rating from 432 Google reviews.
"He explained everything super clearly, didn't try to sell me unnecessary equipment"
Sarah
Related Heating and Cooling Services Near Highlands Ranch
HVAC Services Related to Mini-Splits
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- Furnace replacement in Highlands Ranch
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- Ductless systems
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Mini-Split Questions from Highlands Ranch Homeowners
Can a mini-split heat my room in a Highlands Ranch winter?
Yes, when it’s sized for heating. A mini-split is a heat pump, and your technician sizes it for the room’s heating load first, then shows you the rating of each option.
Do you install ductwork for a mini-split?
No. Mini-splits don’t use ducts, and we don’t build ductwork. The indoor and outdoor units connect with a small line set through the wall.
Do I need a permit for a mini-split in Highlands Ranch?
Yes. Permits come from the Douglas County Building Division, and we pull yours. If the mini-split replaces gas heat entirely, the county treats it as a gas-to-electric conversion with a plan review.
How much does a ductless mini-split cost?
It depends on the number of indoor units, system size and efficiency, line set length and the electrical work. You get a written estimate before you approve anything.
Can you repair my existing mini-split?
Yes. The HVAC diagnostic is $99.95, and your technician reviews the repair price with you before any work starts.
Are there rebates for mini-splits?
Xcel rebates may apply to Xcel customers, and we confirm current amounts with your quote. The federal 25C credit does not apply to equipment placed in service after 2025.
Schedule Mini-Split Installation in Highlands Ranch
Call (720) 870-1580 to schedule a replacement estimate, or request service at /get-a-quote/.