Furnace Replacement Cost Calculator
Get an instant, accurate estimate for your furnace replacement — based on fuel type, home size, AFUE efficiency, and your region. No contractor calls. No email required.
How Much Does Furnace Replacement Cost in 2026?
Furnace replacement costs $3,200 to $7,800 in 2026, with a national average of $5,200 installed. Gas furnaces — the most common type in U.S. homes — range from $2,500 to $11,200 fully installed. Electric furnaces are cheaper upfront at $1,500 to $6,500. Oil furnaces run $2,650 to $7,300.
These figures include the furnace unit itself, installation labor, basic connections, and old-unit removal. They do not include ductwork replacement, electrical upgrades, venting changes, or permits — which are common add-ons that can push total project costs toward $10,000–$14,000 for older homes.
What Affects Furnace Replacement Cost the Most?
1. Fuel Type
Gas furnaces cost more upfront than electric but significantly less to operate. Electric furnaces run at 100% AFUE (no wasted energy) but electricity costs more per BTU than gas in most regions, resulting in $400–$800 higher annual heating bills in cold climates. Natural gas remains the most economical heating choice where gas lines are available — 47% of U.S. homes heat with natural gas.
2. BTU Size
Most homes need 30 to 60 BTUs per square foot depending on climate zone. Cold regions (Midwest, Northeast) need 50–60 BTUs/sq ft; mild regions need 30–40. Larger furnaces cost $500–$1,500 more. Critically, a properly sized furnace outperforms an oversized one — oversized units short-cycle, wear out faster, and create uncomfortable temperature swings.
3. AFUE Efficiency Rating
AFUE (Annual Fuel Utilization Efficiency) measures the percentage of fuel converted to heat. An 80% AFUE furnace wastes 20 cents of every dollar of gas. A 96% AFUE condensing furnace wastes only 4 cents. High-efficiency models cost $1,500–$2,500 more upfront but save $200–$400 per year in cold climates — paying back in 5–8 years. In mild climates, the payback period extends to 10+ years, making 80% AFUE more practical.
4. Region & Local Labor Rates
Labor costs vary significantly by region. Northeast and Mountain states pay 10–18% above national average. Southern states with higher contractor competition often have lower rates. Licensed HVAC installers charge $50–$100 per hour, with most furnace installations taking 4–8 hours. Your region alone can shift total cost by $600–$2,000.
Furnace Replacement Cost Calculator: FAQs
How much does furnace replacement cost in 2026?
Furnace replacement costs $3,200 to $7,800 in 2026 with a national average of $5,200 installed. Gas furnaces range $2,500–$11,200, electric $1,500–$6,500, and oil $2,650–$7,300. The cost depends on fuel type, furnace size (BTU), AFUE efficiency rating, brand tier, and regional labor rates. Use the calculator above for a personalized estimate.
How many BTUs do I need for my furnace?
Most homes need 30–60 BTUs per square foot depending on climate. A 2,000 sq ft home in a cold climate (MN, MI, NY) needs roughly 100,000 BTU. The same home in a mild climate (TX, FL) needs only 60,000–80,000 BTU. Your HVAC contractor will perform a Manual J load calculation to determine exact sizing based on insulation, windows, ceiling height, and climate data.
Is a high-efficiency (96% AFUE) furnace worth the extra cost?
In cold climates like the Midwest and Northeast, yes — a 96% AFUE furnace saves $200–$400 per year vs. an 80% AFUE unit and typically pays back in 5–8 years. In mild southern climates where heating is used 3–4 months a year, the payback extends to 12+ years, making an 80% AFUE model more cost-effective overall. Don’t overbuy on efficiency for mild climates.
Should I repair or replace my furnace?
Use the one-third rule: if repair costs exceed one-third of replacement cost — especially on a unit older than 15 years — replacement is usually better. A $1,800 repair on an 18-year-old furnace that costs $5,000 to replace does not make financial sense. Also consider: is it still under warranty? Is it using R-22 refrigerant? Are your energy bills rising? Any of these signals point toward replacement.
Are there tax credits for furnace replacement?
Gas, propane, and oil furnaces do not qualify for federal tax credits. However, switching to a heat pump during furnace replacement qualifies for a 30% federal tax credit under the Inflation Reduction Act (capped at $2,000/year through 2032). Many gas and electric utilities offer $200–$1,000 rebates for high-efficiency installations — check DSIRE.org or your utility’s website for local programs.
How long does furnace replacement take?
Most furnace replacements take 4–8 hours for a standard like-for-like swap in a single day. Installations requiring new venting (switching from 80% to 96% AFUE condensing requires PVC sidewall venting), ductwork modifications, or electrical upgrades may extend to 2 days. Schedule non-emergency replacements in spring or early fall when contractors have more availability.