Ductless Mini Splits
Ductless Mini-Split & Cold-Climate Heat Pump
Ductless mini-splits are compact heating and cooling systems designed to control the temperature in specific rooms or living spaces within your home or office.
Longmont & Boulder County’s Premier Cold-Climate Heat Pump & VRF Authority | 25+ Years of Local Mechanical Excellence
Schedule Free Ductless Consultation Text 720-891-3518 for Heat Pump Repair Claim Efficiency Works Rebates
Northern Colorado Ductless & Cold-Climate Heat Pump Hub
While high-volume "box-swapper" contractors default to basic gas furnace and AC replacements because they lack variable-refrigerant flow (VRF) expertise, Carroll Mechanical Services brings 25 years of master mechanical engineering to cold-climate heat pumps and ductless mini-split installation in Longmont, CO. As certified specialists in Carrier Greenspeed, Mitsubishi Electric, Daikin, and Fujitsu equipment, we precision-calculate high-altitude heat balance points and design custom zoning for complex Front Range homes.
Cold-Climate Heat Pump Performance Down to -10°F
Modern cold-climate heat pumps feature low-ambient inverter technology calibrated for Northern Colorado winters. They extract heat from freezing outdoor air down to -10°F, delivering reliable year-round warmth without relying on energy-intensive resistance heating.
Boiler & Hydronic Integration: Cooling Without Ductwork
Ductless mini-splits are the single best ductless AC for boiler homes across Longmont and Boulder County. Enjoy whisper-quiet, high-efficiency summer cooling without cutting into plaster, walls, or architectural details to install bulky ductwork.
Multi-Zone Temperature Control & VRF Load Balancing
Eliminate hot second floors, chilly basements, or drafty sunroom additions. Variable Refrigerant Flow (VRF) modulates compressor speed in real time, delivering precise room-by-room temperature control across up to eight independent zones.
Maximize Boulder County & LPC Utility Rebate Savings
Navigate heat pump rebates in Boulder County effortlessly. We handle technical sizing, Manual J load calculations, and rebate filing to help you stack local incentives from Efficiency Works, Longmont Power & Communications (LPC), and 2026 State Tax Credits.
Calculate Your 2026 Front Range Rebate & Tax Credit Savings
Upgrading to a high-efficiency Carrier or Mitsubishi cold-climate heat pump unlocks thousands in stacked savings. We manage all the paperwork to help you claim local rebates from Longmont Power & Communications (LPC), Efficiency Works, and 2026 Colorado State Energy Tax Credits.
Fast 24/7 Heat Pump & Mini-Split Repair in Longmont, CO:
Is your ductless heat pump leaking, flashing error code lights, or failing to heat during a cold snap? Text a clear photo of your indoor head unit or outdoor condenser panel directly to 720-891-3518 for instant visual troubleshooting and priority technician dispatch.
Why a Mini Split?
Mini-splits can be an ideal solution for heating and cooling areas where adding traditional ductwork is not feasible. This makes them especially useful in older homes, room additions, garages, basements, or small office spaces.
The primary advantages of ductless mini-splits include their small size, energy efficiency, and zoning flexibility. Many models allow up to four indoor air-handling units — each controlling a different room or zone — to be connected to a single outdoor unit. This targeted comfort solution can help lower energy costs and improve efficiency. As your local HVAC experts, our team is here to provide you with the options required to live comfortably.
The Team to Trust
Carroll Mechanical Services is a certified Carrier dealer and also services all brands of ductless mini-split heating and cooling systems (including expert Mitsubishi mini split service in Longmont, Dacono, and Firestone). Whether you need routine service or a complete mini split installation, we provide expert support every step of the way.
If you're considering a mini split AC installation for your Longmont-area home or office, Carroll Mechanical Services is here to help. As the best HVAC company in Longmont, CO, we offer free consultations and customized recommendations to ensure you get the right system for your space.
What our customers are saying
Crew Was Outstanding
"Brian just installed a new air conditioner and furnace. The crew was outstanding, the work was excellent and the price was fair. I have to say that Carroll Mechanical is the best company I have ever dealt with. If you want the best quality work, call Carroll Mechanical. I would recommend this company to everyone! If all companies that I have called were this good, I would be so happy! Thank you Brian and crew!"
- Donna J.
Cheaper Quote Than The Competition
"Our very old water heater went out unexpectedly. I called Carroll Mechanical Services as well as another local company. Carroll's quote was $700 cheaper than the other guys, and that included coming out after hours on a Friday to perform the replacement. The installers were friendly, fast, and made no mess. Would definitely hire again."
Could Have Taken Advantage, But Didn't
"First time I called, they gave me advice over the phone for a few simple things to check with my malfunctioning furnace. I got my heat going, and I made a mental note to remember them in the future. Next season I had more problems they fixed a blown fuse for a very reasonable price. Eventually I opted for a total furnace replacement. The install was tidy, the employees were guys you don't mind in your house, and Brien was very organized with rebate, warranty and permit paperwork. Satisfied customer, will be the first place I call in the future."
- Edward N.
Frequently Asked Mini-Split & Heat Pump Questions in Longmont, CO
Ready to get started?
Call us today at (720) 891-3518 for a free consultation on mini split installation or service. Whether you need emergency heat pump repair in Longmont, high-efficiency ductless AC for boiler homes, or multi-zone VRF zoning, we are your trusted local cold-climate heat pump installer near you.