How Much Does a New Gas Furnace Cost?

Typical Range:

$700 - $13,000

Find out how much your project will cost.

Cost data is based on research by HomeAdvisor.

Updated December 10, 2020

Written by HomeAdvisor.

New Gas Furnace Prices

A new gas furnace will cost $700 to $3,500 , or $2,100 on average for the unit alone. Total installation costs between $4,000 and $15,000 including the unit, ducts, labor and any necessary materials. Price ranges reflect differences in regional labor rates, brand, quality and efficiency. High-efficiency models may cost 50% to 100% more than a standard model.

Natural gas furnaces are the most popular way to heat homes—for good reason. They’re fairly cheap to install and easy on the monthly budget. The cost of a new furnace depends on the size of your home, if you need new ducts, and if you plan to get one at a retailer or through a local contractor.

Average Gas Furnace Prices

Average Cost$2,100
High Cost$3,500
Low Cost$700

Natural Gas Furnace Prices

the average price of a gas furnace is $2,100 or $700 to $3,500

Efficient natural gas furnaces typically cost $6,850. Both BTUs and brand factor strongly into the price. Generally, the more you pay, the longer it will last and the more efficient it’ll be. Check out the table below for standard unit prices.

Natural Gas Heating System Prices by BTU

Furnace Size (BTU)Typical Furnace Cost with Installation*
40,000$2,000 - $3,500
50,000$2,300 - $3,800
60,000$2,500 - $4,200
75,000$2,700 - $4,600
80,000$3,000 - $4,900
100,000$3,400 - $5,400
120,000$4,000 - $6,000

*Prices reflect a standard 80%-85% AFUE rating. High efficiency furnaces add 50% to 100% more cost.

British Thermal Units measure how much energy it takes to As you gather quotes, local HVAC pros will tell you how many BTUs your home needs. Generally, a needs between 50,000 and 140,000 . Furnace size depends on a few things, including:

  • Homes age. Older homes aren’t insulated as well. They also tend to leak more air.

  • Climate zone. You’ll need 20-60 BTUs per square foot, depending on your zone. Recent changes to the ASHRAE climate zone map might change how your HVAC pro picks the size for you.

  • Square feet. Bigger homes need more heating. The average home uses an 80,000 to 120,000 BTU furnace.

Gas Forced Air Furnace Price Comparison by Brand

Comparisons for gas furnaces show a fluctuation of $1,000 to $2,000 between brands. Below are some of the top brands and their approximate costs, including installation.

BrandsStandardHigh Efficiency
Amana/Daikin/Goodman$2,500 - $5,500$5,000 - $8,000
American Standard/Trane$2,000 - $8,000$3,000 - $13,000
Carrier/Bryant/Day and Night$2,000 - $9,000$4,500 - $13,000
Lennox$3,000 - $10,000$5,000 - $15,000
Maytag/Frigidaire$2,000 - $7,000$4,500 - $11,000
Payne$1,750 - $5,000$5,000 - $10,000
Rheem/Ruud$2,500 - $7,000$4,500 - $10,000
York/Coleman$2,000 - $6,000$4,000 - $10,000

Contractor’s buy wholesale then markup the price 30% to 50%. Wholesale prices generally aren’t available to the public.

Mobile Home Gas Furnace Prices

You’ll spend between $600 and $1,100 for the furnace alone. Including installation, the typical mobile home project runs $2,500 .

Downflow vs. Upflow Gas Furnace Costs

There's just not much of a price difference between downflow and upflow furnaces. They just push air in different directions. It all depends on where you can install the furnace and where the ducts live. Typically, you’ll find sideflow or downflow furnace in a mobile home, single story installs with no basement or in attics, since it needs to push the air out of the bottom of the unit into the ducts. You’ll more commonly find upflows in basements.

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High Efficiency Furnace Costs

Expect a high efficiency furnace to cost $5,000 to $13,000 including labor. A high efficiency model adds 50% to 100% to the cost of both the unit and installation. Labor runs higher because Standard models might cost less up front, but high efficiency types have strong, long-term benefits, like:

  • Lower monthly

  • Fewer gas emissions.

  • Quieter operation.

  • Less temperature fluctuation in your home.

  • Tax and rebate incentives (vary by location and year).

Energy Efficient Furnace Costs by Rating

TypeAFUEApproximate Unit Cost
Standard Efficiency80% - 89%$500 - $1,500
Moderate Efficiency90% - 95%$1,000 - $3,000
High Efficiency96%+$2,000 - $6,000

The Annual Fuel Efficiency (AFUE) rating evaluates the efficiency of a furnace. A furnace with an AFUE in the 90s is high efficiency while one in the 80s is considered standard. This number reflects the average fuel efficiency over a typical heating season. A furnace with an AFUE rating of 80 is 80% efficient; one with a rating of 90 is 90% efficient.

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Propane Furnace Prices

Propane and natural gas furnaces are the same, just with a slightly different fuel source. Do you want to switch from gas to propane? Buy a Propane usually costs more, but it works for off grid and rural homes.

Gas Heating System Cost Factors

Duct Installation$500 - $2,000
Cleaning Ducts$350 - $500
Energy Audit$200 - $700
Asbestos Remediation$1,000 - $3,000
Labor Costs$50 - $150 per hour
Permits & Fees$350 - $1,800
Conversions$150 - $300

Ductwork Costs

Installing new ducts costs $500 to $2,000 or more at $30 to $55 per linear foot. Get existing ductwork inspected for leaks. Leaks can lead to a loss of 10% to 30% of the heat from your furnace. Properly sealed ductwork reduces this loss to less than 5% on average.

  • Cleaning ducts costs $250-$500. Get an inspection and cleaning at least once a year.

  • A home energy audit costs $200-$700 and helps discover leaks.

  • Asbestos remediation costs $1,000-$3,000. Older homes might have ducts lined or covered in asbestos. These present a serious health hazard and should never be touched by homeowners. If you suspect this type of lining, contact an asbestos inspector near you However, don’t be alarmed. Most professionals agree that asbestos isn’t harmful until it’s disturbed.

Gas Furnace Labor Installation Costs

Labor runs $50 to $150 per hour with each worker clocking an additional $50 per hour. Installation runs about 4 hours for a simple replace and 10 to 15 hours for a straightforward new install.

Fees and Permits

Building permits cost $350 to $1,800 depending on your location and the complexity of the project. Permits to install a new gas furnace typically run on the lower end of that range.

Most permits require inspection at various stages of the process. However, it’s not a bad idea to get an independent inspection from an outside source after the install.

Furnace Conversion Costs

If you are replacing an oil heater with a gas furnace, removing the old oil fuel tank can cost between $500 and $6,500 or more. It ranges so widely because of local regulations and how complex your project might be. Most homeowners can expect it to fall under $1,000. Going from natural gas to propane (lp) is quick and simple. You’ll need a conversion kit for $50 to $150 and a pro to install it for another $100 to $150.

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What is a cheap gas furnace price?

If you can find it, wholesale or used gas furnaces can save you as much as half the price of a new one. However, most pros don’t guarantee work or parts on used units.

How much does an Amana vs. Lennox vs. Carrier gas furnace cost?

With labor for installation, you’ll spend anywhere from $2,000 to $15,000 on an Amana, Lennox or Carrier.

  • Amana: $2,000-$8,000

  • Carrier: $2,500-$13,000

  • Lennox: $3,000-$15,000

How much does a 3-ton gas furnace cost?

A 3-ton, or 36,000 BTU, furnace costs anywhere from $500 to $2,000 depending on the brand and efficiency. Typically, only AC units use “ton” as a measurement of cooling ability while furnaces are sold using BTU’s.

What is the best gas furnace to buy?

The best gas furnace brands include Lennox, Carrier, Bryant, American Standard and Trane. However, your HVAC pro might have a brand they prefer.

How much does it cost to replace a gas furnace?

Replacing a gas furnace with one of similar size costs between $2,000 and $8,000 for standard types.

How long does a gas furnace last?

Depending on the brand and quality, you’ll get 15 to 30 years out of a gas furnace.

Is it cheaper to heat with propane or electric?

Natural gas is cheaper than both propane and electric. Propane is sometimes cheaper than electric to heat your home, but that’s not always the case. Because of seasonal and regional fluctuations in propane and electricity prices, check with a local HVAC professional.

Are propane furnaces efficient?

Propane furnaces use half the fuel of natural gas, but propane prices are much higher. They’re more environmentally responsible but cost more to run.

Is a high-efficiency furnace worth it?

High-efficiency furnaces are worth the investment if you’re looking for:

  • Lower monthly utility bills.

  • Less greenhouse gas emissions.

  • More even temperatures throughout your home.

  • Quieter heating.

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