FurnaceTallyInput BTU, output BTU, and the gap nobody explains.

Replacement Cost

Furnace, install, and the venting work that turns a quote into a project.

4 articles

How much does a 90% AFUE furnace replacement cost in Federal Way, WA?

A 90% AFUE furnace replacement in Federal Way, WA
$5,863
condensing, so it needs PVC venting and a condensate drain · typical range $4,510 – $7,892
Typical totalinstalled, 90 afue$5,863
Range you should see in bidsthree bids on the same scope normally land inside this$4,510 – $7,892
Labor portion40% of the job — this is the part that moves by city$2,345
Material portion60% — bought at national prices$3,518
Heating, Air Conditioning, and Refrigeration Mechanics and Installers pay near Federal Wayabout $41/hr · Seattle-Tacoma-Bellevue, WA metro$85,420/yr
U.S. mean for the same tradeSOC 49-9021$64,780/yr
Versus the national pricetrade pay here runs +31.9% against the U.S. mean+$663
Design temperatures86°F summer and 25°F winter at Seattle-Tacoma Airport — the two numbers a Manual J starts from, and the reason equipment sized for one city is wrong in another—

Notes

  • Where the number comes from. The national price for a 90% AFUE furnace replacement is $5,200 installed — gas furnace replacement pricing published for 2026. Labor is about 40% of that. Heating, Air Conditioning, and Refrigeration Mechanics and Installers near Federal Way, WA average $85,420 a year against a U.S. mean of $64,780 — a factor of 1.319 — so the labor half is scaled by that and the material half is not. Source: BLS OEWS May 2025 for the Seattle-Tacoma-Bellevue, WA metro area, SOC 49-9021.
  • Why the city matters, not just the state. Trade pay moves inside a state as much as it does between states. Crews do not commute across a state to bid a job, and materials ship at national prices either way — so a metro wage is the honest input here and a state average quietly rounds four different cities into one number.
  • Design temperatures. 86°F summer and 25°F winter at Seattle-Tacoma Airport — the two numbers a Manual J starts from, and the reason equipment sized for one city is wrong in another.
  • What is in the price: the furnace, removal and disposal of the old one, a new flue or vent kit, gas and electrical connections, a thermostat, permit and labor.
  • What is not: ductwork changes, a chimney liner where an 80% unit is orphaned by a water heater, and any return-air work the new blower needs. These are the lines that turn a $5,863 quote into a $7,328 invoice, so ask about each one before signing.
  • Use this as a bid check, not a quote. It prices an average job in average condition. Difficult access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a national average for the job.

Furnace replacement cost by city

996 calculations · browse all

Furnace replacement cost by state

204 calculations · browse all