NATE Certified technicians licensed in Arapahoe/Douglas/Jefferson. AC repair, furnace installation, heat pumps, and 24/7 emergency service for Littleton homeowners. From the historic shops on Main Street in downtown Littleton to the Ken Caryl Valley and the trails at Chatfield State Park, we serve all of Littleton. Our licenses in three counties cover every Littleton address — Arapahoe, Douglas, and Jefferson.
Fast diagnosis and repair for all AC brands. Same-day emergency service available 24/7.
Professional central air installation and replacement. Free estimates. Financing available.
Expert furnace repair for all makes and models. 24/7 emergency heating repair.
New furnace installation and replacement. Energy-efficient systems with financing.
Heat pump installation, repair and maintenance. Colorado tax credits may apply.
Annual tune-ups to extend system life and lower energy bills. Comfort Club $179/yr.
24/7 emergency heating and cooling. Nights, weekends, holidays. Fast response.
Smart thermostat installation. Nest, Ecobee, Honeywell. Save 10-23% on bills.
Ductless mini split installation for targeted heating/cooling without ductwork.
Air filtration, humidifiers, UV purification for healthier indoor air.
Commercial heating/cooling for offices, retail, restaurants, small businesses.
Duct repair, sealing, insulation, installation. Stop wasting 20-30% energy.
"These guys go above and beyond. My AC went out mid-July and they located the part same day and came back late to get me running again."
"Our technician came to the house very late at 9:45 pm on Saturday night. This was amazing! It was 90 degrees in our living room with 5 fans running. We are over 80 years old and both of us have heart issues. We were suffering. He repaired it and we had a good night's sleep."
"The team is fantastic and truly honest. He went above and beyond by fixing our heating even after the warranty expired. We deeply appreciate his hard work, excellent support, and dedication to getting the job done right."
Littleton blends historic charm with suburban development. The downtown area near Main Street has homes from the early 1900s, while the Ken Caryl and Columbine areas feature 1970s-1990s construction. This diversity means we encounter virtually every type of HVAC system in Littleton — from converted steam radiators to modern two-zone forced air.
Littleton's western neighborhoods near Ken Caryl sit at the base of the foothills, where cold air drains down from the mountains at night creating temperature inversions. These homes can be 10-15 degrees colder on winter mornings than homes in eastern Littleton. Proper furnace staging (two-stage or modulating) is especially important in these areas.
In older Littleton homes near downtown, the biggest challenge is fitting modern high-efficiency furnaces into spaces designed for much smaller, less efficient equipment. We've become specialists in these tight-space installations, including horizontal installations and right-angle configurations that other companies won't attempt.
Littleton homeowners near Ken Caryl — the mountain drainage effect means your morning temperatures can be drastically colder than the forecast. A programmable thermostat that starts heating 30 minutes before your alarm goes off is a simple comfort upgrade that costs under $200 installed.
We service and install all major HVAC brands including Bryant, Lennox, Goodman, Carrier, Trane, Rheem, and Daikin. Whether you need a repair, replacement, or new installation in Littleton, we bring the right expertise for your specific home and neighborhood.
On Time Heat & Air provides complete heating and cooling services in Littleton and surrounding areas.
Common questions about HVAC service in Littleton.
We provide AC repair, AC installation, furnace repair, furnace installation, heat pump services, ductless mini splits, ductwork services, and emergency 24/7 HVAC service in Littleton. All work is done by NATE-certified technicians.
We offer same-day service in Littleton and across the Denver Metro. Most calls are handled within a few hours. For emergencies, call (720) 527-0668 — we're available 24/7.
Yes. On Time Heat & Air holds active mechanical contractor licenses in 8 Colorado jurisdictions. We are fully licensed and insured to perform HVAC work in Littleton and all surrounding communities.
Yes. We provide free estimates on all HVAC installations and replacements in Littleton. Call (720) 527-0668 or book online to schedule yours.
Helpful articles for Littleton homeowners: