Furnace Replacement Cost (2026): $2,800–$7,500 per Project

Why does furnace replacement cost so much?

Furnace replacement typically runs $2,800 to $7,500, averaging about $4,800 for a full installation (Fixr, HomeAdvisor, Bob Vila). The biggest driver is fuel type. Electric furnaces are cheapest to install at $2,000–$7,000 since they need no venting or fuel lines. Natural gas furnaces run $3,800–$10,000, and oil furnaces are the priciest at $6,750–$10,000 because of the added cost of fuel tanks and delivery lines (This Old House, HomeAdvisor). Heating capacity is the other major factor — furnace size is measured in BTUs and scales with home square footage, so a 1,000 sq ft home might need only $1,200–$2,000 of furnace while a 5,000 sq ft home runs $6,000–$10,000 (Fixr). Labor typically adds $300–$1,800 on top of the unit price, and efficiency rating pushes costs further: moderate-efficiency furnaces run $4,700–$7,000, while high-efficiency models reach $6,200–$11,000 (Today’s Homeowner).

What affects the cost?

A handful of factors explain most of the price spread between a $2,800 job and a $10,000+ one:

• Fuel source. Electric is cheapest ($2,000–$7,000), gas sits in the middle ($3,800–$10,000), and oil runs highest ($6,750–$10,000) (HomeAdvisor, This Old House).
• Heating capacity (BTUs). Bigger homes need bigger furnaces, which cost more — the jump from a 1,000 sq ft to a 5,000 sq ft home roughly quintuples the base cost (Fixr, HomeAdvisor).
• Efficiency rating (AFUE). Standard-efficiency units cost less upfront than high-efficiency models, which run $6,200–$11,000 (Today’s Homeowner).
• Ductwork condition. Old or leaky ducts add $5–$45 per linear foot for repairs, or $1,400–$6,000 for a full replacement (Fixr).
• Brand and model. Pricing varies widely by manufacturer, from budget units like Coleman around $2,500 (Bob Vila) up to premium systems like Trane ($4,800–$14,000) and Lennox ($3,000–$8,500) (Today’s Homeowner).
• Permits and removal. Local permits run $50–$1,500, and removing the old furnace adds $50–$330 (Fixr).
• Labor rate. Installers typically charge $75–$150 per hour, which varies by region (Fixr).

How to lower your furnace replacement cost

• Right-size the unit. An oversized furnace costs more upfront and wastes fuel — have an installer calculate the correct BTU output for your home’s actual square footage rather than defaulting to a bigger model.
• Consider a moderate-efficiency model. Standard-efficiency furnaces ($4,700–$7,000) cost noticeably less upfront than high-efficiency units ($6,200–$11,000); run the payback math before upgrading if fuel savings won’t offset the difference for years.
• Fix ducts only if needed. Ductwork repair or replacement can add $1,400–$6,000 to a project — get a separate inspection so you’re not paying for duct work bundled into a furnace quote unnecessarily.
• Compare fuel types if you have a choice. If your home can run on either gas or electric, gas is often cheaper to install than oil, and electric is cheapest of all, though ongoing fuel costs should factor into the decision too.
• Get multiple quotes. Labor rates alone range from $75 to $150 per hour, and brand pricing on comparable furnaces can vary by thousands of dollars, so comparing local installers is worth the time.

Prices vary by region, home size, and the specific furnace you choose, so treat the figures above as a planning budget. Get two or three local quotes before committing to a final number.