CfmDuctCFM per room to duct diameter, with static pressure counted.

Ductwork Cost

New runs, replacement and the cost of a full redesign.

1 article

Ductwork replacement cost in Missouri for 125 linear feet

A ductwork replacement in Missouri
$4,271
125 linear feet of duct · typical range $2,685 – $7,078
Typical total$34 per linear feet of duct$4,271
Range you should see in bidsthree bids on the same scope normally land inside this$2,685 – $7,078
Labor portion65% of the job — this is the part that moves by state$2,776
Material portion35% — bought at national prices$1,495
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−$104

Notes

  • Where the number comes from. The national price for a ductwork replacement is $35 per linear feet of duct — residential duct replacement pricing published for 2026, $22–$58 per linear foot installed. Labor is about 65% 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: trunk and branch duct, fittings, hangers, mastic sealing, registers and grilles, and labor.
  • What is not: the air handler or furnace, a new return path where none exists, asbestos abatement on old duct wrap, and any drywall work. These are the lines that turn a $4,271 quote into a $5,339 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 65% of the job and moves the total by $104.
  • 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 per-unit average.

Ductwork replacement cost by state

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