Replacement Cost

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

90% AFUE furnace replacement cost in Missouri

A 90% AFUE furnace replacement in Missouri

$5,124

condensing, so it needs PVC venting and a condensate drain · typical range $3,941 – $6,898

Typical totalinstalled, 90 afue	$5,124
Range you should see in bidsthree bids on the same scope normally land inside this	$3,941 – $6,898
Labor portion40% of the job — this is the part that moves by state	$2,050
Material portion60% — bought at national prices	$3,074
Heating, Air Conditioning, and Refrigeration Mechanics and Installers pay in Missouriabout $30/hr · BLS OEWS May 2025, SOC 49-9021	$62,410/yr
U.S. mean for the same tradeSOC 49-9021	$64,780/yr
Versus the national priceMissouri trade pay runs −3.7% against the U.S. mean	−$76

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 in Missouri average $62,410 a year against a U.S. mean of $64,780 — a factor of 0.963 — so the labor half is scaled by that and the material half is not.
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 $5,124 quote into a $6,405 invoice, so ask about each one before signing.
Why state matters more than people expect. Materials ship at national prices; crews do not move. Missouri sits below the national mean by 3.7%, which lands on 40% of the job and moves the total by $76.
Use this as a bid check, not a quote. It prices an average job in an 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.

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