A gas furnace replacement runs about $3,275 to $4,612 at researched defaults: an 80% AFUE furnace by BTU at the low end, a 96% condensing furnace with PVC venting and a condensate pump at the high end, at $135 an hour of labor with permit and haul-away. The scenarios below itemize each tier from a real HVAC pack.
Written by Ashesh Dhakal · The numbers are real resolver output; every price is yours to adjust in your own price book.
An 80% AFUE gas furnace, 80,000 BTU, metal venting — permit and haul-away included, priced from a real HVAC pack.
| Labor — lead | $945.00 |
|---|---|
| 80% AFUE furnace | $1,885.00 |
| Vent connector | $46.20 |
| Gas flex + sediment trap | $62.70 |
| New pad / isolation | $41.25 |
| Permitpass-through · at cost | $225.00 |
| Haul-away / disposal | $70.00 |
| Total | $3,275.15 |
Loading the interactive calculator… the priced example above is already real, computed by the engine.
$3,275.15
$3,444.15
$4,611.95
Every total is integer-cents resolver output from the hvac pack’s researched defaults — nothing hand-typed.
| Line item | Notes | Price |
|---|---|---|
| Labor — lead | $945.00 | |
| 80% AFUE furnace | $1,885.00 | |
| Vent connector | $46.20 | |
| Gas flex + sediment trap | $62.70 | |
| New pad / isolation | $41.25 | |
| Permit | pass-through — at cost, never marked up | $225.00 |
| Haul-away / disposal | commonly forgotten — caught by review | $70.00 |
| Total | $3,275.15 |
Real resolver output from the hvac pack’s researched defaults. The permit is a pass-through billed at cost — never marked up (Law 3); the flagged rows are what low quotes leave off.
A single “ballpark” hides where the money goes. Priced line by line, you can see the equipment, the labor, the code add-ons, and the pass-throughs separately — and check any quote you get against them. That’s the whole point of this tool.
A 96% condensing furnace costs more than an 80% and adds 2-pipe PVC venting plus a condensate pump/neutralizer — but burns less gas.
On the 80% furnace, output scales the price. Size should follow a load calc, not the old nameplate.
A 96% furnace vents through PVC and adds roughly 2 hours of labor plus the condensate handling the pack includes.
Pulling an 80% furnace off a shared chimney can orphan the water heater, requiring a liner — a real pack add-on.
A cheap quote usually gets cheap by leaving something out. These are the same items the app’s review engine flags for a contractor — inverted here, so a homeowner can spot them too.
96% burns about 16% less gas but costs more upfront and needs PVC venting and condensate handling. 80% is cheaper to install and fine in mild climates or shorter stays. This calculator prices both so you can see the install-cost gap directly.
The one a Manual J load calc says — not necessarily the size on the old unit. This tool prices the 80% furnace by BTU output (60/80/100k) so you can see how size moves the number once sizing is confirmed.
Yes, almost everywhere. It's combustion and gas work with life-safety implications, so a permit, inspection, and CO check are standard. A fair quote lists the permit as a pass-through at cost.
Beyond the pricier equipment, a condensing furnace vents through PVC and produces acidic condensate that needs a pump and neutralizer — extra labor and materials this calculator adds when you pick the 96% tier.
Keep going — the trade page, a related calculator, and the line-by-line anatomy post below all share this pack's numbers.
Price HVAC replacements and service — tonnage and zone parametric, Good/Better/Best ready.
HVAC installation cost by tonnage and SEER2 tier, priced Good/Better/Best from a real pack.
Every line of a fair HVAC replacement quote, explained across Good/Better/Best options.
Written by Ashesh Dhakal · The numbers are real resolver output; every price is yours to adjust in your own price book.
HVAC pack defaults are researched from published trade data and labeled researched defaults. This page shows 2026 researched-default pricing and is dated honestly — refreshed when the numbers change, never re-dated to look fresh.