Furnace replacement cost calculator
Furnace replacement cost depends on whether the quote covers the furnace only or a matched furnace and AC system. Home size, furnace efficiency, indoor coil compatibility, venting, gas piping, electrical work, access, permits, and duct condition can all change the installed range.
Direct answer
$4,100 - $9,450
Baseline estimate for a 2,000 sq ft home using furnace + ac before local labor, ductwork, permit, access, and verified incentive adjustments.
Rough install estimate — adjust square footage and system type.
Estimated install range
$4,100 – $9,450
4 Ton System Required · Climate zone 4 · Labor ×1.00
You'll continue to our third-party quote-matching partner's form. We may receive compensation if you submit a request. Availability varies by area.
Compare equivalent scope
Ask each contractor to label the replacement scope before comparing totals. A lower furnace-only bid may be reasonable, but it cannot be compared directly with a matched heating and cooling replacement.
| Quote scope | Usually addresses | Verify in writing |
|---|---|---|
| Furnace only | Furnace, blower, removal, gas and venting connections, controls, startup | Indoor coil compatibility, duct airflow, permit, combustion testing, labor warranty |
| Furnace plus indoor coil | Furnace, blower, matched indoor coil, drain and refrigerant transition scope | Outdoor-unit match, AHRI reference where applicable, line-set assumptions |
| Furnace plus AC | Furnace, indoor coil, outdoor unit, controls, refrigerant work, complete startup | All model numbers, tonnage, SEER2, AFUE, removal, permits, warranty, exclusions |
Input and output BTU plus the load or design assumptions behind them
AFUE and whether venting or condensate requirements change
Blower setting, return-air capacity, filter pressure, and duct condition
Indoor coil, outdoor model, tonnage, controls, and AHRI match when applicable
Gas pressure, temperature rise, combustion, drainage, controls, and final testing
| System | Range | Quote note |
|---|---|---|
| Furnace + AC | $4,100 - $9,450 | Common replacement path where gas heat is still preferred. |
| Heat Pump | $2,850 - $6,200 | Often costs more upfront, but can replace heating and cooling in one system. |
| Central Air | $2,650 - $5,650 | Best for homes with usable ductwork and separate heating. |
| Home size | Tonnage | Range |
|---|---|---|
| 1,200 sq ft | 2 tons | $3,650 - $8,400 |
| 1,600 sq ft | 3 tons | $3,900 - $8,950 |
| 2,000 sq ft | 4 tons | $4,100 - $9,450 |
| 2,400 sq ft | 5 tons | $4,250 - $9,950 |
| 3,000 sq ft | 5 tons | $4,250 - $9,950 |
Estimate a planning range with the calculator.
Collect at least three itemized local bids.
Compare scope before comparing final price.
Use the planning range above as a benchmark, then compare at least three itemized bids with equivalent equipment, sizing, ductwork, permit, startup, and warranty scope.
You'll continue to our third-party quote-matching partner's form. We may receive compensation if you submit a request. Availability varies by area.
The installed cost varies with furnace capacity, AFUE, blower type, venting, gas work, access, permits, and whether the project also replaces the indoor coil or AC. Use an online result as a planning range and compare at least three itemized local bids.
It can make sense when both systems are near end of life or the new indoor coil and blower need to be matched with the outdoor equipment. Ask contractors to price furnace-only and matched furnace-plus-AC options separately before deciding.
It should identify furnace model, input and output BTU, AFUE, blower, thermostat or controls, removal, permit handling, gas and venting work, condensate, startup and combustion testing, labor warranty, exclusions, and any AC or indoor-coil scope.
Not automatically. A low quote may exclude permits, venting corrections, indoor-coil compatibility, duct or return-air work, startup testing, or labor warranty. Compare three bids with equivalent written scope.
Clear HVAC Costs models furnace replacement cost with system type, estimated tonnage, home size, climate assumptions, and typical labor scope. Results are planning ranges only and should be checked against itemized local bids. Last updated August 19, 2026.
