Heating Replacement Quote Calculator
Estimate installed cost for a new furnace, heat pump, or dual fuel setup while projecting fuel savings, payback, NPV, and IRR.
Heating load & efficiency
Costs & finance
Sized at roughly 60,000 BTU/hr (5.00 tons). Installed cost is about $8,079 (range $7,271–$9,290). The efficiency upgrade saves about $225 (16.7%) per year before maintenance, so net cashflow each year is +$75.
Installed cost
$8,079
Annual savings
$225 (16.7%)
Payback
—
NPV
$-7,350
IRR
-18.29%
System sizing
Load: 60,000 BTU/hr
Tonnage: 5.00 tons
Quick sizing only—confirm with a Manual J heat loss calculation for precision.
Energy use
Old: 900 therms/yr
New: 750 therms/yr
Savings shown before maintenance adjustments.
Finance snapshot
Annual net (after maintenance): $75
Discount rate: 6.0% / yr
Horizon: 15 years
Net cashflow over time
Cumulative net cashflow after maintenance across the analysis horizon.
| Item | Amount |
|---|---|
| Equipment (furnace system) | $4,800 |
| Labor & installation | $1,200 |
| Permit & inspection | $250 |
| Ductwork allowance | $600 |
| Thermostat / controls | $250 |
| Miscellaneous & contingency prep | $450 |
| Contingency | $529 |
| Installed cost (typical) | $8,079 |
| Low estimate | $7,271 |
| High estimate | $9,290 |
source: calestimator.com/heating-replacement-calculator
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How to use the Heating Replacement Calculator
Price out furnace or boiler upgrades by combining equipment type, fuel source, labor, and ductwork or venting changes.
- Select gas, electric, or oil equipment and the efficiency rating you want.
- Add labor rates, permits, and removal fees for the old system.
- Include extras such as new vents, humidifiers, or smart controls.
- Compare the estimate with contractor bids to check for outliers.
Heating Replacement Calculator key terms
Knowing how each field influences the results keeps the math grounded in reality.
AFUE
Annual Fuel Utilization Efficiency. Indicates how much fuel is converted into heat. Higher AFUE units cost more but reduce utility bills.
Manual J load
A calculation that determines the heating capacity required for your home. It affects both equipment cost and comfort.
Fuel conversion
Switching from oil to gas or electric may require new lines and venting, adding to project scope.
Heating Replacement Calculator planning ideas
Try running a few “what if” scenarios to translate the numbers into real-world decisions.
Emergency replacement
Model a no-frills install when your furnace fails midwinter to see the minimum you must finance.
Efficiency upgrade
Compare 80% versus 96% AFUE units to gauge the payback period from lower utility bills.
Whole-home comfort add-ons
Budget for duct sealing, zoning, or smart thermostats to avoid future retrofit costs.
Frequently asked questions
How long do furnaces last?
Most systems run 15–20 years. If yours is older, use the calculator to start saving ahead of an emergency replacement.
Should I replace ducts at the same time?
Only if they are undersized or leaking significantly. Running the numbers with and without duct work helps you decide if the comfort gains justify the expense.