Furnace Replacement Cost 2026: Prices, AFUE, Rebates & Quotes

Your furnace is the heart of your home's heating system — and when it fails in January, you don't have the luxury of shopping slowly. This guide gives you the numbers you need before a contractor walks through your door, so you negotiate from knowledge, not desperation.

We cover every cost driver: fuel type, efficiency rating, system size, ductwork condition, and regional labor rates. Use this alongside our HVAC installation cost guide if you're replacing both your furnace and air conditioner at the same time.

Average Furnace Replacement Cost by Type (2026)

| Furnace Type | Equipment Cost | Installation Cost | Total Installed Range | Annual Operating Cost* | |---|---|---|---|---| | Gas Furnace (80% AFUE) | $800–$2,000 | $1,200–$2,000 | $2,000–$4,000 | $800–$1,400 | | Gas Furnace (96%+ AFUE) | $1,500–$3,500 | $1,500–$2,500 | $3,000–$6,000 | $550–$950 | | Electric Furnace | $700–$2,000 | $800–$1,500 | $1,500–$3,500 | $1,500–$3,000 | | Oil Furnace (80% AFUE) | $1,500–$3,000 | $1,500–$2,500 | $3,000–$5,500 | $1,800–$3,500 | | Propane Furnace | $1,000–$2,500 | $1,200–$2,000 | $2,200–$4,500 | $1,200–$2,200 |

*Annual operating costs estimated for a 2,000 sq ft home in a cold-climate state (Zone 5+). Electric costs assume $0.14/kWh; gas at $1.20/therm.

The big picture: A gas furnace costs more upfront than electric in many homes, but operating cost depends heavily on local gas and electric rates. Compare both fuel options using your local utility prices before deciding.

Furnace Cost by Efficiency Tier

The AFUE (Annual Fuel Utilization Efficiency) rating tells you how much of the fuel your furnace converts to heat vs. venting to the outdoors. Every percentage point matters on your gas bill.

| AFUE Rating | Efficiency Tier | Equipment Cost | Operating Cost Impact | Rebate Check | |---|---|---|---|---| | 80% AFUE | Standard (minimum code) | $800–$2,000 | — | No | | 90–92% AFUE | Mid-Efficiency | $1,200–$2,500 | $100–$200/year | No | | 95-96% AFUE | High-Efficiency | $1,500–$3,000 | $180–$320/year | Verify current eligibility | | 97-98% AFUE | Ultra-High-Efficiency | $2,500–$4,000 | $220–$380/year | Verify current eligibility |

Key insight: High-efficiency furnaces use a second heat exchanger (called a condensing furnace) that captures heat from exhaust gases before they vent. This requires a PVC plastic flue instead of a metal flue — which means higher installation cost if your old system used a metal chimney vent. Ask your contractor if a new venting run is required.

Furnace Cost by Home Size (BTU Requirements)

| Home Size | BTU Needed (Cold Climate) | BTU Needed (Moderate Climate) | Typical Equipment Cost | |---|---|---|---| | 500–1,000 sq ft | 40,000–60,000 BTU | 30,000–50,000 BTU | $800–$1,500 | | 1,000–1,500 sq ft | 60,000–80,000 BTU | 50,000–70,000 BTU | $1,000–$2,000 | | 1,500–2,000 sq ft | 80,000–100,000 BTU | 70,000–90,000 BTU | $1,200–$2,500 | | 2,000–2,500 sq ft | 100,000–120,000 BTU | 90,000–110,000 BTU | $1,500–$3,000 | | 2,500–3,500 sq ft | 120,000–150,000 BTU | 110,000–130,000 BTU | $2,000–$4,000 |

Warning: Many contractors "size up" to avoid callbacks — but an oversized furnace short-cycles (blasts heat then shuts off rapidly), creates uneven temperatures, and wears out faster. Insist on a Manual J load calculation. It costs nothing extra and protects you.

Regional Cost Differences

Labor rates for furnace installation vary significantly by state and metro area. Here's what homeowners pay for a mid-range 96% AFUE gas furnace fully installed:

| State / Region | Typical Installed Cost | Labor Rate Index | Notes | |---|---|---|---| | Minnesota, Wisconsin, Iowa | $3,200–$5,800 | Moderate | High demand, experienced crews | | Illinois, Indiana, Ohio | $3,000–$5,500 | Moderate | Competitive contractor market | | Michigan, Pennsylvania | $3,200–$6,000 | Moderate-High | Older housing stock, complex installs | | New York, New Jersey | $4,000–$7,500 | High | High labor rates, permit requirements | | Colorado, Utah | $3,000–$5,500 | Moderate | Mountain weather, altitude adjustments | | Washington, Oregon | $3,500–$6,500 | High | Heat pump alternatives common | | Texas, Oklahoma | $2,500–$4,500 | Low-Moderate | Lower labor costs, mild winters | | California | $4,000–$7,000 | High | Strict efficiency standards, permitting | | National Average | $3,000–$5,500 | — | Mid-efficiency gas furnace |

6 Things That Drive Your Final Cost Higher

1. Ductwork Repairs or Replacement

If your ducts are leaky, disconnected, or undersized, a new furnace won't work efficiently. Duct sealing costs $1,500–$4,000; full duct replacement runs $5,000–$12,000.

2. Venting Upgrades for High-Efficiency Units

Switching from an 80% to a 96%+ AFUE furnace requires new PVC venting (condensing furnaces can't use metal flues). New vent runs add $300–$1,000 to the job.

3. Gas Line Modifications

If you're upsizing the furnace or adding a furnace to a home that previously used electric or oil heat, a new gas line costs $500–$2,000 depending on run length.

4. Permits and Inspections

Most jurisdictions require a mechanical permit for furnace replacement. Fees range from $50–$300. Never skip this — unpermitted work voids manufacturer warranties and complicates home sales.

5. Electrical Service

Modern variable-speed furnaces require dedicated 120V or 240V circuits. Older homes may need panel upgrades adding $500–$2,500.

6. Emergency vs. Scheduled Installation

A furnace replaced during an emergency breakdown (mid-January, no heat) can cost $500–$1,500 more in labor. When possible, schedule replacements in fall before heating season peaks.

How to Save on Furnace Replacement

Get 3+ Bids — Seriously

Price variation for the same furnace job often runs $1,500–$2,500 between contractors. Getting three bids takes two days but typically pays better than any other action you take.

Time Your Replacement

Install in September–October before heating season demand spikes. Contractors have more availability, and you avoid emergency premium pricing.

Check Rebates Before You Sign

For new 2026 projects, do not assume old federal credit rules apply. Instead, ask each contractor to document:

• Exact furnace model and AFUE rating
• Utility rebate eligibility for your ZIP code
• Whether pre-approval is required
• Whether any rebate is deducted from the quote or only estimated
• What happens if the rebate is rejected

If you are considering switching from gas to all-electric heating, compare a heat pump quote side by side with furnace replacement.

Negotiate on Equipment, Not Labor

Labor is largely fixed. Equipment has more margin. Ask your contractor what brand/model they're quoting and research the wholesale price — then negotiate on the equipment line, not the install fee.

Signs It's Time to Replace (Not Repair)

| Situation | Replace or Repair? | |---|---| | Furnace is under 15 years old, single failed part | Repair | | Furnace is 15–20 years old, repair cost > $800 | Borderline — get quotes both ways | | Furnace is 20+ years old | Replace — even if it "still works" | | Repair quote > 50% of new system cost | Always replace | | Frequent repairs (2+ in 3 years) | Replace | | Gas bill has risen 25%+ despite same usage | Replace — efficiency is degrading | | Yellow or orange burner flame (should be blue) | Replace — carbon monoxide risk | | Excessive noise (banging, popping, rattling) | Get inspected; likely replace |

A cracked heat exchanger — the leading failure point in older furnaces — is a safety issue, not just a comfort one. Carbon monoxide from a cracked exchanger is colorless and odorless. If a technician cites a cracked heat exchanger, get a second opinion, but take it seriously.

Bottom Line: What to Budget

For most homeowners replacing a gas furnace in a home with existing ductwork:

• Budget system (80% AFUE): $4,000–$6,500 installed
• Recommended system (96% AFUE): $5,500–$8,500 installed

Federal credit rules changed after 2025. For new 2026 installations, verify current IRS rules before budgeting around a federal credit. Gas utility rebates ($50–$400) are still widely available in many service areas — ask your contractor which apply to your ZIP code.

The high-efficiency unit can make sense if you plan to stay in the home long enough for lower fuel use and comfort improvements to matter. Verify the payback with your utility rates and final installed quote.

Furnace Lifespan and Maintenance

A gas furnace is one of the longest-lasting home mechanical systems — 20–30 years is common with proper care. Compare that to a heat pump (15–20 years) or central AC (15–20 years).

Annual furnace maintenance checklist:

• Replace air filter (monthly to quarterly depending on MERV rating)
• Annual professional tune-up ($80–$150): burner cleaning, heat exchanger inspection, flue check, safety control test
• Inspect and clean flame sensor annually (common failure point)
• Check for carbon monoxide with a CO detector near the unit

Signs of deteriorating efficiency:

• Gas bill rising despite similar usage and weather
• Longer run times to reach setpoint
• Uneven temperatures between rooms
• Increased cycling (on/off more frequently than normal)

A well-maintained furnace at 95% of its design life still runs at close to rated efficiency. A neglected 10-year-old furnace may run significantly below its rated AFUE.

Use our HVAC upgrade planner to model your specific situation, and visit the HVAC hub for guidance on choosing the right contractors and equipment in your area.