Heating and Air Conditioning - Rocky Mountain Air Systems - 24/7 - Free Estimates

Furnace Replacement & New Installation Cost

New Furnace Estimate | Call (720) 620-7556

We show real pricing from our most recently completed furnace installation projects. Prices include labor, materials, warranties, and permits. No pressure, no hidden fees, and no inflated pricing.

Furnace replacement costs range from $3,000 for a basic single stage furnace in the smallest size to $12k for a premium cold climate heat pump of the largest size. Most homeowners pay $8k to $12k for a complete heating and cooling combo. Get a free quote for exact pricing.     Check Financing Options      



New Furnace Installation Deals

Furnace Replacement by Authorized Dealer - Free Estimates

AmericanStandard-S8X1B-
American Standard - 80% Efficiency - Single Stage
Model #S8X1B / 80% AFUE / Made by Trane
10 Year Parts Warranty / 1 Year Labor warranty
Energy Efficient Mutil Speed ECM Motors

Specifications / Warranty Info

Starting at $2499** INSTALLED!
Standard Efficiency - Limited Availability

goodman-gmes96-furnace-
Goodman 96% - High Efficiency - Single Stage
Model #GR9S96 / 96% AFUE/ Gas or Propane
10 Year Parts Warranty / 1 Year Labor warranty
Energy Efficient Multi-Speed ECM Motor

Specifications / Warranty Info

Starting at $4499** INSTALLED!
Most Common High Efficiency Models

goodman-gmes96-furnace-
Goodman 96% - High Efficiency - Two Stage
Model #GMVC96 / 96% AFUE / Gas or Propane
10 Year Parts Warranty / 1 Year Labor warranty
Efficient and quiet variable speed blower

Specifications / Warranty Info

Starting at $5199** INSTALLED!
ComfortBridge™ communicating system compatible

ames96-gas-furnace-
Amana 96% - High Efficiency - Single Stage
Model #AR9S96 / 96% AFUE / Gas or Propane
10 Year Parts Warranty / 5 Year Labor warranty
Energy Efficient Multi-Speed ECM Motor

Specifications / Warranty Info

Starting at $5299** INSTALLED!
Low NOx emissions standard

amvc96-gas-furnace-
Amana 96% - High Efficiency - Two Stage
Model #AMVC96 / 96% AFUE / Gas or Propane
10 Year Parts Warranty / 5 Year Labor warranty
Energy Efficient Variable-Speed ECM Motor

Specifications / Warranty Info

Starting at $6099** INSTALLED!
Integrated communicating ComfortBridge™

Get A New Furnace Estimate Now?

Schedule a free in-home estimate for your new furnace installation.




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Monday –Friday: 8am–6pm

Saturday: 8am–3pm

Sunday: Closed



One of our representatives will respond to your request within 24 hours!

Furnace Installation - Frequently Asked Questions


Q: When Do I Need a New Furnace?

A:

If your old furnace has stopped working entirely or expensive repair jobs are getting more frequent, it’s definitely time for a new furnace. Furnaces on average last 20 years, but even if your old one seems to work okay, it might still be time to consider replacement with a more efficient unit to save money over the long run and enjoy more comfort and quiet now.


Q: What Does Furnace AFUE Mean?

A:

Annual Fuel Utilization Efficiency (AFUE) is a standard percentage rating that measures how efficiently your furnace converts fuel into usable heat over the course of a typical heating season. It measures the amount of heat actually delivered to your house compared to the amount of fuel that you must supply to the furnace. Thus, a furnace that has an 80% AFUE rating converts 80% of the fuel that you supply to heat -- the other 20% is lost out of the exhaust.


Q: Single Stage vs Two Stage Furnace?

A:

A single stage furnace runs at one fixed (100%) capacity whenever it is on. It operates on an all or nothing approach by blasting maximum heat until your home reaches the target temperature, then it turns off which leads to frequent on-and-off cycles, while a two stage furnace has two operating levels (usually low at 60–70% and high at 100%) to adjust heating based on outdoor weather.



The two Stage Furnace starts on a low energy saving setting (60% to 70% capacity) for mild days. It ramps up to high capacity only during cold weather or if the low setting cannot satisfy the thermostat within 10 to 15 minutes. Two stage models run longer, gentler cycles that maintain a steady indoor temperature and eliminate sharp hot and cold swings. Single stage systems can cause noticeable temperature ups and downs especially on older homes which usually have more heat loss and gain than a newer home.



Two stage units are typically quieter too because they spend most of their time running at lower capacities. Single stage systems can sound louder or more abrupt during startup and operation due to the constant full blast cycling. Two stage systems also use less gas by operating at a lower capacity during mild weather. Single stage units always consume max energy per cycle. Single stage furnaces have a lower upfront purchase and installation cost. Two stage furnaces cost more initially (usually about $1,000 more), but can save on fuel bills over time.


Q: Multi-Speed Blower Motor vs Variable Speed Blower?

A:

A multi speed furnace blower only has a set number of predefined speeds (high, medium, and low), whereas a true variable speed blower adjusts its airflow smoothly across dozens of micro speeds. Variable speed motors provide superior humidity control, quieter operation, and higher energy efficiency, but multi-speed models cost less upfront

Multi-Speed Blowers are usually powered by a constant-torque ECM or older PSC motor wired to a few fixed speeds. It switches between specific preset airflow levels depending on your call for heating or cooling.

Variable Speed Blowers are powered by a programmed ECM motor that continuously ramps up or down in small increments. It calculates the exact cubic feet per minute (CFM) of air required to maintain an even temperature and static pressure in the home.


Q: How Long Does the Furnace Installation Take?

A:

Most furnace and AC replacements take 4 to 6 hours to complete. Heat pumps do usually take longer and run 6 to 8 hours on average. We can usually get installs scheduled and installed within 48 hours of the first call and we prioritize anyone with no heat in the winter and no cooling in the summer.


Q: What Furnace Brands Do You Install?

A:

We're authorized dealers and installers of Goodman, American Standard, Innovair, and Amana. All brands we sell come with a 10 parts warranty from the manufacturer and our labor warranty on the units varies depending on which system you buy.


Q: Do You Offer Any Discounts?

A:

Yes. We give a $100 discount on any new furnace or ac purchase to public school teachers, fire fighters, EMR team members, nurses, police officers, senior citizens, and all military. Subtract that from our already low prices and it makes our deals even a little sweeter. (limit 2 per household)


Q: Where Do I Register the Warranty On My New Furnace?


Q: What Forms Of Payment Do You Take?

A:

We will take any credit or debit card and green cash or a cashiers check but we DO NOT take personal Checks, Bitcoin, or Paypal!


Q: Do You Install Mobile Home Furnaces?

A:

No, we do not work on mobile homes.


Q: How Often Should I Replace My Furnace Air Filter?

A:

We recommend you do it every 3 months. The cleaner the filter, the better the airflow, which keeps the system running efficiently.

Need Furnace Repair or Replacement?

Please Select a Service Area Near You



Communities: Bow Mar, Stonegate, Lowry, Dakota Ridge, Lakeside, Ken Caryl, Windy Hills, Louviers, Kiowa, franktown, The Pinery, Foxfield, Eastlake, Barr Lake, Reunion, Quail Hill, Meridian, Roxborough Park, Pine Bluffs, Canterberry Crossing, Chatfield, Ponderosa Park, Sterling Ranch

Why Choose Us?

Easy Estimates

We can provide exact price phone estimates on most new furnace and AC jobs in 10 minutes or less! It's Fast, easy, and Convienent!

Technical Experience

Combined, our lead techs have over half a century of technical experience. We are ready to put it to action for you!

Dedicated Service

We service and repair only units sold and installed by us, so we are fully dedicated to customers purchasing new systems.

Professional Service

Our experts have the training and the tools necessary to provide new system installations in a thorough and efficient manner

Customer Reviews

I had both my furnace and ac units replaced by Rocky Mountain Air Systems. They are near me and the price was affordable and we have had no issues. Tracy is very knowledgeable. Would recommend to friends in the future!

Brittany G.

Had a new air conditioning unit installed in my new build. The team was very friendly, showed up on time, and even wore booties to not mess up my wood floors. They did quality work had great furnace and AC advice and I wouldn't hesitate to recommend them in the future.

Jack G.

Great customer service!! And showed up on time. We had our AC installed and they even put a nice boot over the air conditioning lines into the house! Very impressed!

Tabatha W.