Professional central air installation and replacement. Free estimates on all new systems. NATE Certified technicians Licensed in 8 Colorado jurisdictions.
A properly sized and installed air conditioning system is critical for comfort and energy efficiency in Colorado. On Time Heat & Air provides professional AC installation with careful load calculations to ensure your new system is perfectly matched to your home. We install high-efficiency systems from top manufacturers and handle all permits and inspections. Every installation includes a full system test, thermostat setup, and a walkthrough of your new equipment. We offer 0% financing for qualified buyers and can often complete installations within 1-2 days of approval.
Our NATE Certified technicians have the training and real-world experience to handle any ac installation job. We hold active licenses in 8 Colorado jurisdictions — Adams, Arapahoe, Aurora, Broomfield, Commerce City, Denver, Douglas, and Jefferson — so we're authorized to work anywhere in the Denver metro. We provide upfront pricing, honest recommendations, and stand behind every job.
Select your city for location-specific ac installation information:
Fast diagnosis and repair for all AC brands. Same-day emergency service available 24/7.
Expert furnace repair for all makes and models. 24/7 emergency heating repair available.
New furnace installation and replacement. Energy-efficient systems with financing options.
Heat pump installation, repair and maintenance. Year-round comfort, energy-efficient.
Annual AC tune-ups and maintenance to extend system life and keep energy bills low.
Free tips and guides from our NATE Certified team:
Most HVAC companies size your AC using a rule of thumb — "1 ton per 500 square feet." That shortcut ignores insulation, window exposure, ductwork condition, and the fact that Denver sits at 5,280 feet where air behaves differently. We run a full Manual J load calculation on every installation to get the right size for your specific home.
An oversized AC short-cycles — it cools fast but never removes humidity, leaving your home clammy and driving up your electricity bill. An undersized system runs nonstop and never catches up on hot days. Proper sizing is the single most important factor in AC performance, and it's the step most contractors skip.
Every system we install is calibrated for Front Range altitude. We verify refrigerant charge, airflow, and temperature split before we leave. We pull all required permits in whichever county you're in — Adams, Arapahoe, Denver, Douglas, Jefferson, Broomfield, Aurora, or Commerce City.
We offer 0% APR financing from $79/month so you don't have to sweat through a summer waiting to save up. See our AC installation cost guide for detailed pricing.
Common questions from Denver Metro homeowners.
A new central AC installation in the Denver Metro typically costs $3,500 to $10,500 depending on system size, efficiency rating, and installation complexity. A 3-ton 16 SEER system for an average home runs about $5,500–$7,000. See our full pricing guide for details.
Most Denver Metro homes (1,700–2,100 sq ft) need a 3-ton system. We use Manual J load calculations to size your system properly — accounting for altitude, insulation, window exposure, and home layout. Oversized units short-cycle and waste energy.
Most installations are completed in one day — typically 4 to 8 hours. Straightforward replacements take 4–5 hours. If we need to run new electrical, install a lineset, or modify ductwork, it may take a full day.
Yes. At 5,000+ feet, AC systems lose 3–5% cooling capacity compared to sea level. Compressor performance, refrigerant pressures, and airflow all change with elevation. We calibrate every installation for Front Range altitude.
Yes. We offer 0% APR financing starting from $79/month on qualifying installations. No early payoff penalties. We handle the paperwork during your estimate appointment.
Serving Henderson, CO too — AC Installation in Henderson →