How Much Does Furnace Replacement Cost in 2026?

Gas vs. Electric vs. Heat Pump: What Each Option Costs Installed

When your heating system begins to fail, the first decision you face is choosing the right fuel source. According to data from Angi and HomeAdvisor, the average furnace replacement costs between $2,823 and $6,897, with a national average of around $4,814. However, the fuel type you select heavily influences this baseline.

Electric Furnaces

Electric furnaces are the most affordable systems to purchase and install upfront, typically ranging from $2,000 to $7,000 [This Old House]. Because they do not require venting pipes, gas lines, or complex combustion chambers, the installation is relatively straightforward. However, unless you live in a mild climate with low electricity rates, the ongoing operational costs can be significantly higher than gas alternatives.

Natural Gas Furnaces

Natural gas is the most common heating choice, used by approximately 58% of homeowners surveyed by Angi [Angi]. Installing a gas furnace typically costs between $3,800 and $10,000, though high-end modulating models can reach up to $12,000 [HomeAdvisor]. While more expensive upfront than electric units, gas furnaces offer lower monthly utility bills in colder regions.

Oil Furnaces

Commonly found in the Northeast, oil furnaces cost between $6,750 and $10,000 to install [This Old House]. They provide high heat output but have additional internal components and maintenance requirements.

Heat Pumps

If you are considering moving away from a traditional furnace, a central air-source heat pump costs an average of $10,575 to install [This Old House]. Heat pumps handle both heating and cooling, making them highly efficient, though they may require a backup heat source in extreme sub-zero climates.

Size and Efficiency: The Two Numbers on Every Quote

Every professional HVAC quote will feature two critical specifications: the system's heating capacity (measured in BTUs) and its efficiency rating (AFUE). Sizing must be calculated precisely; an oversized unit will cycle on and off too quickly, wearing out components, while an undersized unit will run constantly without warming the home [Fixr].

Sizing by Home Square Footage

As a general rule, homes require 30 to 60 BTUs per square foot, depending on local climate and insulation quality [Angi]. Below is a breakdown of typical installed costs by home size:

Home Size (Sq. Ft.)	Required BTUs	Average Installed Cost Range
1,000	30,000 – 60,000	$1,200 – $2,000
2,000	60,000 – 120,000	$2,400 – $4,000
3,000	90,000 – 180,000	$3,600 – $6,000
4,000	120,000 – 240,000	$4,800 – $8,000

Understanding AFUE Ratings

Annual Fuel Utilization Efficiency (AFUE) measures how efficiently a furnace converts fuel into usable heat. For example, an 80% AFUE furnace converts 80% of its fuel to heat, while wasting the other 20% through exhaust.

Standard Efficiency (80% – 89% AFUE): Costs $3,800 to $6,200 installed. Best for mild climates where the furnace runs infrequently [HomeGuide].
Moderate Efficiency (90% – 95% AFUE): Costs $5,200 to $8,800 installed. Balances upfront equipment costs with moderate monthly savings [HomeGuide].
High Efficiency (96%+ AFUE): Costs $7,500 to $12,000 installed. These premium units utilize sealed combustion and advanced controls for peak energy savings, making them ideal for long, harsh winters [HomeGuide].

What Drives the Price?

Beyond the physical furnace unit, several project variables can alter your final invoice:

Labor Rates: HVAC technicians typically charge $75 to $100 per hour, with additional crew members costing around $50 per hour [Angi]. A standard replacement takes 4 to 18 hours depending on system complexity [Bob Vila].
Permits and Inspections: Local building permits for furnace installations generally cost between $400 and $1,500, depending on municipal requirements [Angi].
Old Unit Removal: Disposing of your old furnace safely usually incurs a fee of $60 to $330 [Angi].
Ductwork Modifications: If your existing ducts are leaking or improperly sized for the new system, repairs can cost $300 to $1,500, while a full ductwork replacement ranges from $1,400 to $5,600 [HomeGuide].

Regional Ranges

Your geographic location impacts both labor rates and the heating capacity your home requires. In warmer southern states, a smaller furnace with fewer BTUs is sufficient, keeping costs on the lower end of the spectrum. In contrast, northern states require heavy-duty, high-efficiency systems to handle freezing temperatures.

For example, according to Bob Vila, a typical installation in Atlanta, Georgia, ranges from $2,250 to $6,000, whereas the same project in Boston, Massachusetts, averages $2,750 to $7,400 due to higher local labor rates and heating demands.

Running Costs and the Heat Pump Question

While electric furnaces are cheaper to install, they are often the most expensive to run. According to HomeAdvisor, typical seasonal running costs break down as follows:

Natural Gas: $850 per winter season
Electric Furnace: $900 per winter season (can be higher depending on local utility rates)
Propane: $1,550 per winter season
Heat Pump: $500 per winter season

If you are looking to lower your carbon footprint and reduce monthly bills, upgrading to a high-efficiency system may qualify you for federal tax incentives. Under the Energy Efficient Home Improvement Credit (Section 25C), taxpayers can claim a nonrefundable credit of up to $600 for qualified natural gas, propane, or oil furnaces that meet specific efficiency criteria, or up to $2,000 per year for qualified heat pumps [IRS].

When Repair Beats Replace

Before committing to a full replacement, consider the age and condition of your current unit. Furnaces last 15 to 30 years on average [HomeGuide]. If your system is under 15 years old, a repair may be the more economical choice, but you should compare the quoted repair cost against the price of a new unit.

However, you should plan for a replacement if you notice:

Frequent, costly repairs within the last two years.
A sudden, unexplained spike in monthly energy bills.
Visible structural defects, such as heavy rust or cracks, which can be dangerous and indicate severe wear [HomeAdvisor].
Uneven heating or persistent loud noises (banging, rattling, or squealing) [HomeAdvisor]. A noisy unit does not tell you which part failed; get a professional diagnosis and proposed repair in writing before comparing replacement costs.

DIY vs. Professional Installation

Furnace replacement is not a DIY project. Working with natural gas, high-voltage electricity, and carbon monoxide venting requires specialized training, licensing, and adherence to local building codes. An improperly installed furnace can lead to gas leaks, electrical fires, or deadly carbon monoxide poisoning [Angi].

Quick Answers

How long does a standard furnace last?

On average, a well-maintained furnace lasts 15 to 30 years, though electric models often last slightly longer than gas systems due to simpler internal mechanics.

Can I change from an oil furnace to a gas furnace?

Yes. Converting from oil to natural gas is a common upgrade that improves efficiency and lowers maintenance, though you must factor in the additional cost of running a gas line to your home, which typically adds $500 to $6,540 depending on complexity.

What is the federal tax credit for a new furnace?

Under the Energy Efficient Home Improvement Credit, qualified energy-efficient natural gas, propane, or oil furnaces installed in your primary residence can qualify for a tax credit of up to $600.

More Cost Guides

Compare two quotes on the same scope

Illustrative inputs. Add confirmed extras once; do not double-count items already included. This compares totals, not workmanship, licensing or contract terms.

Sources and research notes

Research checked 2026-09-24. Source comparison; this is a research synthesis. Findings attributed to other reviewers remain their work.

What the evidence does not establish

Actual local labor rates and permit fees vary significantly by municipality and state.
Ductwork modifications or complete replacements are not included in standard furnace installation estimates and must be quoted separately.