"Lou was great - very patient and explained everything to me several times, got a new furnace installed quickly and was available to ask questions even on a Saturday night. Highly recommend!"
Furnace Replacement & Installation in the Denver Metro
Installing a furnace in Denver isn't the same as installing one in Dallas or Atlanta. Denver sits at 5,280 feet, and altitude derating means gas furnaces deliver roughly 80% of their rated BTU output compared to sea level. If a company sizes your furnace without accounting for altitude, you'll end up with an undersized system that runs constantly and can't keep up on the coldest days. Lou's Heating & Cooling does it right. We calculate the actual heating load for your home, account for Denver's altitude, and install equipment that will keep you comfortable through a Colorado winter.
Signs You Need Furnace Installation Service
- Furnace is 15-20+ years old (average furnace lifespan is 15-20 years)
- Repair costs exceed 50% of replacement cost
- The system struggles to maintain temperature on very cold days
- Multiple zone temperature differences that repairs haven't resolved
- Cracked heat exchanger (a safety issue requiring immediate replacement)
- Your system was improperly sized when originally installed
What to Expect
- Free in-home estimate
We visit your home and perform a proper load calculation using Manual J methodology, accounting for Denver's altitude, your home's insulation, and square footage.
- Recommendation
We recommend the right furnace for your home, not the most expensive one. As an Authorized Carrier Dealer, we offer a full range of efficiency levels and configurations.
- Installation
Most furnace replacements are completed in a single day. We handle the old unit removal, new installation, and all connections.
- Combustion testing
Every new furnace installation includes a combustion safety test and CO measurement before we consider the job done.
- Warranty registration
We register your 10-year extended equipment warranty and explain your 5-year workmanship warranty.
Our Commitment to You
Flat Rate Pricing
You get a price before we start any work. No hourly surprises, no hidden fees.
Free Estimates
Free in-home estimates on all installations. No obligation to move forward.
10-Year Warranty (New Equipment)
All new installations include a 10-year extended parts warranty plus our 5-year workmanship warranty.
24/7 Emergency Service
HVAC doesn't break on schedule. We answer calls around the clock.
What Our Customers Say
"Lou's HVAC did a fantastic job replacing our old furnace. The team was professional, efficient, and left everything clean. Our home is now warm and comfortable. Highly recommend!"
Furnace Installation FAQs
How long does a furnace last in Denver?
15-20 years is the typical range for a gas furnace. Well-maintained units can run 25+, neglected ones fail at 10. At the 15-year mark an evaluation is worth it so you're not facing emergency replacement in January.
What's the cost range for a new furnace install in Denver?
A new gas furnace installed in Denver typically runs $3,000-$7,000 — efficiency level, size, and install complexity drive the range. Permits, ductwork modifications, and flue upgrades can add cost. Free in-home estimates.
Do you handle permits and inspections?
Yes. All furnace installations in Colorado require permits, and our installations include permit work and final inspections. You don't have to chase paperwork or coordinate with the city.
What efficiency level should I get?
For most Denver homes, a 96% AFUE two-stage or variable-speed furnace is the sweet spot — efficient enough to qualify for Xcel rebates, durable, and well-suited to our long heating season. Single-stage 80% AFUE units are budget options for milder use cases.
Related Services
Furnace Repair
Furnace not heating? We diagnose honestly and fix fast. 24/7 service available.
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Maintenance
Seasonal tune-ups that prevent breakdowns and extend equipment life.
Learn More