Why did furnace installation prices increase in Colorado?

Colorado's HB23-1161 law (effective January 1, 2026) requires all new gas furnaces to meet ultra-low NOx emissions standards. This effectively eliminated standard 80% AFUE furnaces from new installations in Colorado. Compliant 96%+ AFUE Energy Star certified furnaces cost more than the old entry-level units — but they also use 18% less gas annually, recovering the cost difference within 5–8 years on a typical Denver heating bill.

Can I still get a cheap furnace installed in Denver?

Not as a brand-new unit after January 1, 2026 — HB23-1161 requires new gas furnaces to be ultra-low NOx or Energy Star 96%+ AFUE compliant. However, contractors may still have pre-regulation inventory (units manufactured before December 31, 2025) available on a limited basis at lower prices. Call 303-327-9208 to ask about current inventory. If budget is the primary concern, a Goodman or Amana 96% AFUE unit is the most affordable fully compliant option.

Furnace Installation Cost in Denver, CO — 2026 Guide

Complete furnace replacement pricing for Denver — all efficiency ratings, all brands, no hidden costs.

Residential diagnostic $79.95, waived with approved repair; commercial $150–$250. Written upfront quotes.

New furnace installation in Denver typically runs $5,400–$7,500 installed in our 2026 quoting. Full furnace + AC replacement projects often land around $10,000–$19,000. Pricing varies with AFUE tier, brand, BTU sizing, ductwork, and electrical needs.

Included in our quotes: equipment, labor, permit ($75–$150), old unit removal, altitude adjustment, startup and combustion testing, and a 1-year labor warranty.

How Colorado HB23-1161 Affects Furnace Installation Costs in Denver

Colorado's HB23-1161 requires new gas furnaces sold in Colorado to meet ultra-low NOx emissions standards — so most new installs are high-efficiency 96%+ AFUE compliant equipment. Existing furnaces are not affected; repairs remain fully permitted.

Request an in-home estimate for your exact home — we run a Manual J load calculation before recommending equipment.

Brands We Service

TraneCarrierGoodmanAmanaRheemRuudMaytagGEComfortmakerHeilLennox

Why Denver Homeowners Choose Us

10+ years serving the Denver metro. Here is what sets us apart from other HVAC companies.

NATE & EPA Certified

North American Technician Excellence certification is the HVAC industry's highest credential. Our EPA Section 608 certification is federally required for refrigerant handling.

True 24/7 Emergency Service

Live dispatch, not an answering machine. When you call at 2am, a real technician dispatcher answers and routes the nearest available tech to you.

Upfront, Flat-Rate Pricing

We quote the full job price before starting any work. No hourly surprises, no hidden fees. Residential diagnostic $79.95 — waived when you proceed with an approved repair. Commercial diagnostic typically $150–$250.

All Major Brands Serviced

Trane, Carrier, Goodman, Rheem, Lennox, Amana, Maytag, GE, Comfortmaker, Heil, and more. Our technicians carry parts for the most common brands on every truck.

4.3-Star Rated

Over 84 verified customer reviews. We earn our reputation on every call — we will tell you when repair makes more sense than replacement.

Denver Altitude Specialists

Denver's 5,280-ft elevation affects HVAC combustion and performance. Our technicians are trained on altitude adjustments that general contractors often miss.

Furnace Installation Pricing FAQs

Most furnace-only replacements we quote fall around $5,400–$7,500 installed after HB23-1161 compliant equipment requirements. Full furnace + AC changeouts often range $10,000–$19,000. Quotes include equipment, labor, Denver permit, old unit removal, altitude adjustment, and startup testing.

4.3 Stars — 84+ Google Reviews

Real reviews from Denver homeowners and businesses. We earn every one.

Genesis Payne

HVAC Maintenance

"I booked them for a full HVAC system checkup before winter. They inspected heating and cooling units thoroughly. A few small issues were fixed on the spot. Very reliable and skilled team."

April 2026

Russell Ellis

AC Repair

"Our air conditioning stopped working in the middle of summer. They responded fast and provided excellent HVAC repair service. The technician was professional and very knowledgeable. Our home is cool and comfortable again."

April 2026

Jessica Maslow

Emergency Furnace Repair

"Great service and communication! Our furnace went out during a cold spell and they were able to get us back up and running within a day. The team was easy to work with and explained everything well. Alfredo, Merrill and Lisa went above and beyond to take care of us! Highly recommend!"

April 2025

Isela Lopez

AC Repair

"My AC quit working on a 90 degree day. I called Denver's Best and they were able to fit me in for a same day appointment. I was so thankful to get my AC repaired the same day — especially with my 3 kids home for summer vacation. AJ was very knowledgeable and professional! I will be calling this company for any future AC or heating repairs."

July 2024

Michael Smith

Furnace & AC Installation

"We give Denver's Best HVAC five stars. Very fair pricing on our water heater, furnace replacement, and AC install. Merrill, the install tech, was very knowledgeable. He identified duct work issues improving air flow throughout the house, and installed a REME-HALO air purification system. Our air is now very clean. You REALLY ARE Denver's Best HVAC."

March 2024

Jame Clario

AC & Furnace Installation

"The service on my AC and furnace install was wonderful. The office staff was very responsive and professional. Zachary, my technician, was very thorough and knowledgeable. He kept me informed and also advised me on getting regular maintenance. I would highly recommend this company."

June 2023

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