Find a furnace installer in Denver, CO

Find furnace installers in Denver, CO

Find furnace installers in Denver, CO

Share a few details and we'll show you the best furnace replacement contractors in your area.
Zip code

Find furnace installers in Denver, CO

Share a few details and we'll show you the best furnace replacement contractors in your area.
Zip code

Top 10 furnace replacement contractors in Denver, CO

Homeowners agree: these Denver furnace installers are highly rated for knowledge, experience, communication, and more.
Mountain Breeze Heating & Air

Mountain Breeze Heating & Air

18 hires on HomeGuide
17+ years in business
Serves Denver, CO
Joseph W. says, "Their bid was the lowest of 4 bids and they had very good recent reviews. The installers we very professional and creative with my installation requirements. I needed a crawlspace / horizontal install of a complete residential HVAC system as well as a new location for the new condenser unit. It has only been a few days with the new Amana system, but so far so good. It is much quieter." Read more
1st Choice Mechnical

1st Choice Mechnical

1 hire on HomeGuide
9+ years in business
Serves Denver, CO
Dhi (rhymes With B. says, "They were great to work with -- good communication, very considerate and friendly tech guys, fair pricing and no surprises. They did what they said they'd do, right on schedule. Highly recommended!" Read more
Firestorm Heating And Cooling

Firestorm Heating And Cooling

New on HomeGuide
10+ years in business
Serves Denver, CO
We offer competitive clean fast service. Over 30 years of experience. We take pride in quality work to make the customer feel at ease with the whole process from start to finish.
FenAir Heating And Cooling

FenAir Heating And Cooling

New on HomeGuide
9+ years in business
Serves Denver, CO
We are proudly, locally owned and operated. We believe in being fair and competitive with our rates and pricing. Our team is professional and efficient with over 20 years of experience. FenAir always uses integrity when advising which exact system is best for you and your family. We want to have the chance to earn your business and to prove to you that you made the right choice.
ABETTER HEATING & AIR.   303-408-8004.       Model& Serial #  Of Your Equipment

ABETTER HEATING & AIR. 303-408-8004. Model& Serial # Of Your Equipment

1 hire on HomeGuide
46+ years in business
Serves Denver, CO
Mark S. says, "Tom was very quick to respond and quoted a price for a new AC unit and labor that was a full $2000-$3000 dollars LESS than 3 other quotes I got. He and his sons came out the very next day and had the new unit up and running in less than 2 hours. Excellent communication and prices you can't beat. Highly recommend Tom and ABetter Heating and Air!" Read more


16+ years in business
Serves Denver, CO
Autumn F. says, "From start to finish, my experience with MileHi HVAC was nothing short of exceptional. Their team of professionals are knowledgeable, friendly, efficient, and they go above and beyond to ensure their customers are satisfied. The team was prompt in scheduling an appointment and the technician was able to quickly identify the issues with my old system and provide a thorough explanation of my options for a new one. He was patient with my questions and I ultimately decided on a new system. The installation process was smooth and seamless. If you're looking for a company hat truly cares about their customers and providing excellent service, look no further!" Read more
Goodfellas Heating And Cooling

Goodfellas Heating And Cooling

12+ years in business
Serves Denver, CO
Kendra S. says, "GoodFellas came out and did my duct clean and installed my a/c, furnace, and w/h. They did an amazing job, very quick, clean, and professional." Read more
To The T Plumbing & Heating

To The T Plumbing & Heating

New on HomeGuide
5+ years in business
Serves Denver, CO
To the T Plumbing & Heating, LLC, founded in 2010 and based in Thornton, CO, is a family-owned and operated business offering top-notch plumbing and HVAC services. With over 15 years of industry experience, their team of NATE-certified professionals serves both commercial and residential clients in the Northern Colorado region. They specialize in various services, from new constructions and replacements to repairs and installations of existing systems, all delivered with meticulous attention to detail and a commitment to long-term customer satisfaction.
Tri Peaks Air Inc.

Tri Peaks Air Inc.

Serves Denver, CO
Nellie T. says, "Justin and his team were absolutly amazing! I had 3 other companies give me a quote for a new furnace and AC but only Tri Peaks Air took the time to explain how everything worked so I knew I was getting the right system installed. Highly recommend!!!" Read more
Rent A Service

Rent A Service

4 hires on HomeGuide
9+ years in business
Serves Denver, CO
Clare Edwards G. says, "Thorough, friendly great with my dog! " Read more

Your Furnace and Heating System Installation or Replacement questions, answered

Answers to commonly asked questions from the experts on HomeGuide.

How much does it cost to install or replace a furnace?

Furnace replacement costs $2,000 to $5,400 on average for gas, electric, oil, or propane heating systems. A high-efficiency gas furnace costs $3,300 to $6,900 installed. New furnace prices depend on the system size, efficiency, brand, fuel type, and install labor.

  • Installing a new furnace and ductwork costs $3,800 to $12,000.
  • Replacing a new furnace and AC costs $4,000 to $10,000.

When should you need to replace a furnace?

Replace a furnace when the current unit is more than 15 years old and requires frequent fixing, or when repairs cost more than half the replacement cost.

Signs a furnace is going out:

  • Energy bills are increasing.
  • Rooms heat unevenly.
  • Fuel lines rust or system chamber cracks.
  • The thermostat malfunctions.
  • Furnace cycles on and off frequently or makes loud noises.
  • Dust or soot buildup appears.
  • Interior air smells like a gas leak.
  • The gas-furnace flame is yellow instead of blue.

How long does a furnace last?

A furnace lasts 15 to 30 years on average, depending on the fuel type, brand, usage, and maintenance frequency. Electric furnaces typically outlast gas, propane, and oil furnaces by 5 to 10 years.

Average furnace lifespan by type

  • Gas furnace 15 – 25 years
  • Oil furnace 15 – 25 years
  • Electric furnace 20 – 30 years
  • Propane furnace 15 – 20 years

How long does it take to install a furnace?

Replacing or installing a new furnace takes 4 to 18 hours on average, depending on the fuel type, size, and complexity. Extra time applies for modifying ductwork, electrical, or gas lines, adding vents or zoning, or retrofitting a larger furnace.

How to pay for a new furnace?

Options to pay for a new furnace include:

  • Monthly payment financing from the supplier
  • Home-improvement or bank loans
  • Furnace rebates and tax credits of $100 to $500 from manufacturers, dealers, utility company, or government programs
  • Credit card payment plans

What's the difference between a gas, oil, and electric furnace?

The differences between a gas, oil, and electric furnace are their fuel source, heating power, and operating costs.

  • Gas furnaces ignite propane or natural gas to heat and circulate air through the ductwork. Gas furnaces heat faster than electric.
  • Oil furnaces burn oil from an external tank to heat and circulate air through ducts. Oil furnaces are less efficient than gas and require more maintenance, but have faster heating.
  • Electric furnaces heat and circulate air with electricity or solar panels. Electric furnaces are the most energy-efficient, but have the highest operating costs.

What's the difference between a boiler, furnace, and heat pump?

Boilers circulate water or steam, furnaces circulate hot air, and heat pumps circulate refrigerant to provide heating.

  • Boilers use natural gas, propane, electricity, or heating oil to heat and circulate water or steam through pipes to radiators in each room.
  • Furnaces move centrally heated air through ducts to each room. Furnaces use gas, propane, electricity, or oil.
  • Heat pumps use electricity and refrigerant to transfer outside heat from the air, ground, or water into the home.

How to find local furnace replacement pros near me?

Furnace replacement quotes are typically free. When getting furnace estimates, use this checklist:

  • Compare at least three different estimates from experienced installers.
  • Avoid choosing the lowest bids that signal low-quality work.
  • Select licensed, insured, and bonded HVAC contractors.
  • Review their ratings on HomeGuide and Google.
  • Request copies of estimates, plan diagrams, heating-load calculations, equipment orders, permits, warranties, and contracts.
  • Verify the estimates include material, labor, equipment costs, and the installation schedule.
  • Set up a payment schedule. Never pay in full upfront.
  • Ask the questions below before signing a contract.

Choose HVAC installers with certifications from:

  • North American Technician Excellence (NATE)
  • American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE)
  • National Propane Gas Association (NPGA)
  • State-certified natural gas journeyman training programs in gas fittings

What questions should I ask furnace installation companies?

When looking to hire the best furnace contractor near you, ask them the following questions:

  • How many furnaces have you installed?
  • Can you give me references from past jobs?
  • What's the efficiency rating of this furnace? Do you recommend high-efficiency systems?
  • Does this furnace qualify for tax credits or rebates?
  • Is this furnace compatible with my existing ductwork, wiring, and thermostat?
  • Do you have a warranty for repairs?
  • Do you offer a maintenance plan?
  • Will you use the Manual J load calculation to size my new furnace?
  • How much are permits and inspections?
  • Are all labor, materials, old furnace disposal, and cleanup fees included in this estimate? What other costs apply?
  • Are any ductwork modifications necessary?
  • Will I need electrical or gas line work?
  • Do you subcontract the electrical work?
  • Do you test my ducts for leaks?
  • How long will the installation take?
  • Do you offer financing?
  • What's your payment timeline?
  • Do you follow all building code requirements?
  • Do I need a backup heater for this system?

Should you tip furnace installers?

Furnace installers don’t expect a tip and it's not customary. However, tipping $10 to $20 per person is a nice gesture when installers do a great job.

Reviews for Denver furnace replacement contractors

Recent success stories from people in the Denver area.
Stephen S.
They came out and gave me an estimate and did the installation promptly and professionally. Maybe more semi-professional, most companies put on booties when walking through the house, this company did put down a floor covering but walked elsewhere during the final part of the installation, which is why I gave the 4 stars and not 5. Overall we are very pleased.
Mountain Breeze Heating & Air
Leah C.
We had 1st choice to do routine check up of our furnace. They arrived promptly and got everything finished and cleaned up. They were then able to email me a receipt. Great service and very professional
1st Choice Mechnical
Tera N.
Honest and professional. Their willingness to explain and show me the issues with my AC unit last summer was much appreciated.
Goodfellas Heating and Cooling
Charlotte H.
I liked everything about working with Tri Peaks Air. The office's communication about my install was great, and they answered all my questions. The tech where on time, professional, respectful and carful with my stuff and home. Very pleasing experience would recommend to anyone looking HVAC help.
Tri Peaks Air Inc.
Judy M.
Rich does excellent work and he's very reliable. He replaced a fence around my property and was very easy to work with.
Affordable Fence LLC
Angel D.
The name of this company truly says it all! Professional, Caring, Respectful, and Honest! ❤️
Heart Heating, Cooling, Plumbing & Electric
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