A new furnace installation is typically a one-day job. Price depends on the fuel type, the efficiency (AFUE) you choose, the size your home needs, and any venting or gas-line work.
A furnace installation removes the old unit and sets a new one sized to your home's heating load, then connects the gas or electrical supply, the venting, the ductwork, and the thermostat, and commissions the system. High-efficiency (90%+ AFUE) furnaces use sealed PVC venting and produce condensate that needs a drain.
If your air conditioner shares the same coil and blower and is also aging, replacing both at once keeps the system matched and usually costs less than two visits.
Natural gas is the most common. Propane and oil furnaces cost more; electric furnaces are cheaper to install but expensive to run.
80% AFUE is the baseline; 90–98% high-efficiency models cost more up front and cut fuel use, and add sealed venting and a condensate drain.
Roughly 30–40 BTU per square foot, confirmed by a load calculation. An oversized furnace short-cycles.
Switching from an 80% to a 90%+ furnace usually means new PVC venting and a condensate line.
Upsizing a gas line or adding a circuit for the blower adds cost.
A permit, combustion analysis, and startup test should be included.
Installed ranges for a typical home. Tailor it with the Furnace Replacement Cost Calculator.
| Furnace type | Typical range |
|---|---|
| Gas furnace, 80% AFUE | $3,000 – $5,500 |
| Gas furnace, 90–96% AFUE | $4,500 – $8,000 |
| Propane furnace | $3,500 – $7,000 |
| Oil furnace | $5,000 – $9,000 |
| Electric furnace | $2,500 – $5,000 |
| Venting conversion (80% → 90%+) | +$500 – $1,500 |
| Full system (furnace + AC) | $8,000 – $16,000 |
A furnace replacement is usually a single-day job. A typical install includes:
Gas work must be done by a licensed professional. Never attempt furnace gas connections or venting yourself.
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An 80% AFUE gas furnace runs about $3,000–$5,500 installed; a 90–96% high-efficiency model runs $4,500–$8,000. Propane, oil, and electric furnaces fall outside that range. Estimate yours with the Furnace Replacement Cost Calculator.
In cold climates with high heating bills, usually yes — the fuel savings add up. In mild climates the payback is longer. A 90%+ furnace also requires new sealed venting and a condensate drain, which adds to the install cost.
A like-for-like furnace replacement is typically done in one day. Converting from an 80% to a 90%+ furnace adds a few hours for the new venting.
No. Furnace installation involves gas connections, venting, and combustion safety that must be handled by a licensed professional and permitted and inspected.
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