Emergency Service Available

Serving Englewood, CO and the surrounding areas

(303) 900-4054

How can we help?

Don’t wait until you’re stuck scrambling to buy a new furnace and trying to do the research to see which one to get! It’s better to be Pro-Active and know your budget for your new furnace.

So how much will replacing your furnace cost you when all is said and done? In the Denver area, a furnace installation costs anywhere from $2,100 to $8000. We Know, That’s probably no help! But it’s tough to give an accurate price with inspecting your home and seeing your heating needs.

Here are 4 guidelines for estimating your furnace installation cost:

1. The higher the Efficiency the higher the cost

More efficient means lower monthly heating costs and paybacks can come in about 4 years. The very minimum, you can get these day is an 80% AFUE furnace. But we suggest going even higher. Why? Right now Utility Companies have great rebate programs going on, as well as manufactures cash-back programs.

2. The bigger the furnace, the better it heats your home

Bigger NOT better. You don’t get to pick the size furnace you want. Instead, our professional needs to perform a load calculation that will determine the size furnace you need. A load calculation (Manual J) will tell you how quickly hot air escapes from/cold air enters your home. And this will tell you the correct size furnace you need. Without a load calculation, you’ll end up with a Oversized or undersized furnace. Oversized, means you’ll pay more for a unit that will “short-cycle” (turns on then off quickly) which increases energy bills and decreases the furnaces lifespan and be more noisier. Undersized furnace, means the furnace will run longer than it should. And this results in high energy bills and frequent repairs. The other confusing part is don’t assume that you’re fine replacing your current furnace with one that’s the same size as you old one. We find most furnaces in the Metro Denver homes are sized incorrectly from the very beginning.

3. Comfort features have higher costs

Not all furnaces are the same. Some will have these advanced “comfort features”, like:

The Variable-Speed Blower Motor technology helps with your comfort and energy bills. This feature ensures your home receives better air flow required to keep you comfortable and variable-speed motor consume much less electricity than standard furnace motors. Continuous fan operation is highly recommended for its many benefits including constant filtration, more efficient furnace and A/C operation and mixing air within the home during off cycles to promote more even temperatures room to room and floor to floor.

Modulating furnaces feature two important benefits – variable-speed blowers and modulating gas valves. These components each have the ability to adjust their operation incrementally. The benefits of these combinations help fine-tuned temperature control paired with a minimal use of electricity and gas. Modulating furnaces are among the most energy efficient units on the market today (98% AFUE). This gives you the benefit of lower operating costs and are also less noisy. Because of the way it operates, a modulating furnace provides greater comfort with steady even heat, which means you’ll enjoy fewer comfort issues like hot and cold spots or inconsistent temperatures.

Smart/programmable thermostats are a great option to upgrade when they replace your furnace. These thermostats allow you to set heating schedules to lower your monthly bills and can even allow you to adjust your home’s temperature remotely.

4. Difficulties in Installation can raise the price

Some examples of “difficult” furnace replacements could include: Homes that have ductwork issues, such as leaky ducts. Furnaces that are installed in hard-to-reach areas like the attic or crawlspace. Also Code issues that may need attention.

If you want to know exactly how much it will cost to replace your current furnace, just contact us at 303-922-6289. We’ll send over our consultant to perform a detailed inspection and give you an estimate—all for FREE.

Special Offers

Put your worries behind and work with the local experts, Gustafson Heating & Air Conditioning Inc.

More special offers

$45 off repair

Customer Reviews

Leave a review More reviews

Gary W.

WOW, what a great job Gustafson Heating and Air Conditioning did for my wife and I. They were professional, fast, and way less expensive than the others we looked into. We really appreciate what they did. It was in the winter when our furnace broke down and they replaced it immediately. They left our home clean and warm and we will appreciate the cool air this coming summer. THANK YOU Mike and your team!

Kristina C.

I received a number of quotes to install a whole home humidifier. Gustafson was amazing from start to finish. I was able to handle everything over the phone without needing an additional in-person quote with a number of upcharges. I spoke to a gentleman who walked me through options by seeing pictures of my setup and was extremely knowledgable on what was necessary to ensure I was getting the correct humidifier for my home. The pricing was extremely competitive compared to the others and was not full of hidden charges. When I called, they were able to get an appointment set up within a week. The service tech was on time, courteous, cleaned up after himself, and walked me through the whole setup.

Svein R.

I got three quotes for a heat pump and gas furnace back-up. Gustafson’s was the most competitive. In addition, Mike McCarthy was, and is, a gem; very knowledgeable and responsive. The other Gustafson employees on the job were courteous and professional. I am very pleased with the equipment and the installation, which was a difficult one. I highly recommend Gustafson!

Meagan P.

Gustafson installed our HVAC system in 2019 and have been so great with service! They’re honest and back up their work. Recently our A/C wasn’t cooling to the set temp. Todd was so kind & diligent in teaching us what to do as homeowners, but also servicing/cleaning the mechanics and we’re back to a nice, cool home just in time for higher temperatures!

Scott H.

Purchased a mini-split (AC / Heat Pump) unsure if I’d be able to install it or not. I installed most of it myself but there were a few technical procedures I didn’t have the expertise or tools to undertake. Dillon came out and finished the job, doing top-notch work and taking in account the aesthetics of the unit inside and out. Very reasonable price as far as I’m concerned. My new go to neighborhood HVAC company.

David R.

Basement flooded. This is where my WFH office is, so it was a big deal. Gustafson sent out Todd to fix it. He got it fixed quickly, and charged me a very reasonable fee. Basement is warm and dry now. I can’t say enough good things about Gustafson.

Steven B.

The technician “Luis” was fantastic as usual. All the services and technicians we have used with Gustafson over 12 years have been prompt, professional, timely and reasonable over the years. I definitely approve of this vendor!!!

William R.

Our furnace went out and our regular company gave us a 2 week window for coming out. We have a RHEEM furnace and needed an authorized RHEEM dealer. I called Gustafson and they came out in 48 hrs. They were so nice and the technician –Dylan–was so helpful that I am switching companies. Really a great experience.

Sonja L.

Absolutely the best!!!! This is an honest company with very professional people working for them. The price for all work is always very fair and very reasonable!!!

Krista B.

I had the whole HVAC system installed by Gustafson about three years ago and recently requested maintenance on the system. Technician Robert Gomez was the tech that responded and he was very personable, easy to talk to, and explained what he was doing to me to service my furnace. I felt like I received thorough service and he provided advice for the future as well. Thank you, Robert!! I hope to be able to request you again in the future to do maintenance on my AC next spring.

Code of Ethics:

  • Providing services at or above accepted industry standards
  • Providing exceptional customer service and supportive, long-term relationships with our customers
  • Ensuring that Honesty and Integrity are the hallmark of all of our business practices and services
  • Improving through continuing education and training

Request Service

Our team of expert HVAC technicians are ready to assist you, 24/7. No job is too big or small: We come prepared. Put your worries behind and work with the local experts, Gustafson Heating & Air Conditioning

Contact us

Gustafson Heating & Air are expert HVAC professionals trained to take care of any comfort issue you may have!

We’re a Lennox Dealer and are trained to deliver a level of comfort and service that exceeds customer expectations. Because Gustafson Heating & Air understand that actions speak louder than words, instead of just talking quality, we practice it through listening and responding to your comfort needs.

Industry-Leading Products

As partners with the leading name in home comfort, Lennox has the best products available in the industry, including highly efficient systems from the Dave Lennox Signature® Collection made here in the United States.

Highly rated for customer satisfaction

In order to sell Lennox products, Gustafson Heating & Air must consistently meet and exceed customer expectations. To ensure we do that, we are trained to design, install, service and maintain HVAC systems. We are dedicated to achieving complete customer satisfaction and must maintain a 4-star rating among consumers.

Rheem product line

Highlands Ranch, CO

Commerce City, CO

Arvada, CO

Centennial, CO

Littleton, CO

Wheat Ridge, CO

Englewood, CO