Furnace Replacement Cost: Full Breakdown (2026)
💰 Cost Breakdown
| Item | Low | Average | High |
|---|---|---|---|
| Standard Efficiency Gas Furnace (80% AFUE) Single-stage, non-condensing furnace. Uses a conventional metal flue vent. Lowest upfront cost but higher operating expenses. Being phased out by new DOE efficiency standards in many regions. | $1,800 | $2,800 | $4,000 |
| High-Efficiency Gas Furnace (90–96% AFUE) Condensing furnace that extracts more heat from combustion gases. Requires PVC venting (can be routed through a sidewall). Most popular choice for replacement in 2026. Single or two-stage operation. | $2,500 | $4,200 | $6,000 |
| Premium Gas Furnace (97–98% AFUE) Top-tier condensing furnace with variable-speed blower and modulating gas valve. Delivers the most even heating and lowest gas bills. Quietest operation. Brands include Carrier Infinity, Trane XV, Lennox SLP98. | $4,000 | $5,800 | $7,500 |
| Electric Furnace Uses electric resistance heating elements. No gas line required. Lower installation cost but significantly higher operating costs in most markets. Best suited for mild climates or areas without natural gas service. | $1,500 | $2,500 | $3,800 |
| Oil Furnace Burns heating oil stored in an on-site tank. Common in the Northeast where natural gas infrastructure is limited. Higher fuel costs than gas but lower than electric in cold climates. Requires annual maintenance. | $3,000 | $4,800 | $7,000 |
| Installation Labor Includes removing the old furnace, setting the new unit, connecting gas and electrical, venting, ductwork modifications if needed, thermostat setup, and startup testing. Typically 4–8 hours for a straightforward replacement. | $1,200 | $2,000 | $3,000 |
Standard Efficiency Gas Furnace (80% AFUE)
Single-stage, non-condensing furnace. Uses a conventional metal flue vent. Lowest upfront cost but higher operating expenses. Being phased out by new DOE efficiency standards in many regions.
High-Efficiency Gas Furnace (90–96% AFUE)
Condensing furnace that extracts more heat from combustion gases. Requires PVC venting (can be routed through a sidewall). Most popular choice for replacement in 2026. Single or two-stage operation.
Premium Gas Furnace (97–98% AFUE)
Top-tier condensing furnace with variable-speed blower and modulating gas valve. Delivers the most even heating and lowest gas bills. Quietest operation. Brands include Carrier Infinity, Trane XV, Lennox SLP98.
Electric Furnace
Uses electric resistance heating elements. No gas line required. Lower installation cost but significantly higher operating costs in most markets. Best suited for mild climates or areas without natural gas service.
Oil Furnace
Burns heating oil stored in an on-site tank. Common in the Northeast where natural gas infrastructure is limited. Higher fuel costs than gas but lower than electric in cold climates. Requires annual maintenance.
Installation Labor
Includes removing the old furnace, setting the new unit, connecting gas and electrical, venting, ductwork modifications if needed, thermostat setup, and startup testing. Typically 4–8 hours for a straightforward replacement.
📊 Factors That Impact Cost
Efficiency Rating (AFUE)
High ImpactAn 80% AFUE furnace wastes 20 cents of every dollar of gas. A 96% AFUE furnace wastes only 4 cents. The higher-efficiency unit costs $500–$1,500 more upfront but saves $200–$400 per year in fuel — typically paying back the premium within 3–5 years.
Furnace Size (BTU Output)
High ImpactFurnaces range from 40,000–120,000 BTU. Proper sizing depends on your home's square footage, insulation, climate zone, and window area. An oversized furnace short-cycles and wastes energy; an undersized one cannot keep up on the coldest days.
Venting Requirements
Medium ImpactStandard 80% furnaces use metal flue venting through the roof. High-efficiency condensing furnaces use PVC piping that can exit through a sidewall. Switching from standard to high-efficiency may require removing the old metal flue and adding PVC — $200–$600 in additional work.
Ductwork Condition
Medium ImpactIf existing ductwork is in poor condition — leaking, undersized, or disconnected — the installer may need to seal, repair, or modify ducts. Ductwork modifications add $300–$1,500 to the project. Leaky ducts waste 20–30% of heated air.
Brand
Medium ImpactPremium brands (Carrier, Trane, Lennox) cost 15–30% more than value brands (Goodman, Amana, Rheem). Premium brands often include longer warranties and proprietary features. For most homeowners, mid-tier brands offer the best value.
Installation Complexity
Medium ImpactStraightforward same-location replacements cost less. Moving the furnace location, converting from oil to gas, upgrading electrical, or making significant duct changes can add $500–$2,000 in labor and materials.
💡 Money-Saving Tips
Replace in the off-season (spring or early fall)
HVAC contractors are less busy in spring and early fall. Many offer pre-season discounts of 5–15% to fill their schedules. You also avoid the stress and premium pricing of an emergency replacement during a cold snap.
Get at least three itemized quotes
Pricing varies significantly between installers. Get three written quotes that break down equipment cost, labor, permits, and any ductwork modifications separately. This prevents being overcharged on any single line item.
Check for utility rebates and tax credits
Many gas utilities offer $200–$800 rebates for high-efficiency furnace installations. The federal 25C tax credit covers up to $600 for qualifying furnaces (AFUE 97%+). Some states offer additional incentives.
Skip the premium brand for basic functionality
A Goodman or Amana 96% AFUE furnace performs the same basic function as a Carrier or Trane at 20–30% less cost. Premium brands add value through longer warranties, quieter operation, and advanced features — but if budget is tight, value brands deliver reliable heating.