Replacing flexible ductwork typically costs $500-$3,500 for most U.S. homes, with major drivers being linear feet, access, and whether plenums or boots require work. This article breaks down typical flexible ductwork replacement price ranges and the factors that change bids so homeowners can budget accurately for duct replacement cost.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Whole-house replacement (typical 1,000 sq ft home) | $500 | $1,800 | $3,500 | Assumptions: 100–200 linear ft, attic access, standard 6–10″ ducts. |
| Per linear foot (material + install) | $3 per ft | $8 per ft | $15 per ft | Assumptions: includes fittings, basic insulation, easy access. |
| Single supply run (per run) | $40 | $120 | $300 | Assumptions: 6–8″ diameter, 10–30 ft run. |
| Replacement of boot or register | $25 | $75 | $200 | Assumptions: simple replacement vs. curb or boot rebuild. |
Content Navigation
- Total Cost to Replace Flexible Ductwork for a Typical Home
- Cost Breakdown: Materials, Labor, Equipment, and Fees
- How Linear Feet, Diameter, and Number of Runs Affect Pricing
- Practical Ways to Lower Flexible Duct Replacement Price
- Region-by-Region Price Differences and What to Expect
- Common Add-Ons, Removal Fees, and Job Time Estimates
- Three Real-World Quote Examples With Specs and Pricing
Total Cost to Replace Flexible Ductwork for a Typical Home
Most homeowners pay $500-$3,500 total to replace flexible ductwork; the average is about $1,200-$2,000 for an average 1,000–2,000 sq ft house. Basic jobs replace 100–200 linear feet of flex with standard 6–10″ insulated duct at $3-$12 per linear foot.
Assumptions: Midwest labor rates, attic access, four to eight supply runs, one return, no major HVAC unit work.
Cost Breakdown: Materials, Labor, Equipment, and Fees
| Materials | Labor | Equipment | Delivery/Disposal | Permits | Overhead |
|---|---|---|---|---|---|
| $100-$800 (duct, collars, tape, boots) | $300-$1,500 ($75-$125 per hour) | $50-$300 (lifts, scaffolds) | $0-$200 (small job dumpster) | $0-$200 (local permit) | $50-$500 (contractor markup) |
Labor often represents 40%–60% of the total quote for replacement work because of routing, sealing, and testing.
Assumptions: crew of 1–2 techs, 3–12 hours depending on runs.
How Linear Feet, Diameter, and Number of Runs Affect Pricing
Price scales by linear footage and number of branches: small jobs under 50 linear ft often have higher per-foot costs ($8-$15/ft) while larger jobs over 200 ft drop to $3-$6/ft. Expect a step change in pricing once a job exceeds about 200 linear feet due to volume discounts and longer setup time.
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Diameter matters: 4–6″ flex is cheaper per foot than 8–12″ because material and fittings cost more for larger diameters. Long single runs over 25–30 ft can add $10-$40 per run for bracing, transitions, or additional support.
Practical Ways to Lower Flexible Duct Replacement Price
Limit scope: replace only damaged runs instead of full-system swap, and choose standard insulated flex instead of premium lined or metal transitions. Prepping access (clearing attic space, removing stored items) can cut labor hours and reduce the final invoice.
Bundle tasks with other HVAC work to get contractor discounts, compare at least three written quotes, and schedule during off-peak seasons when contractors offer lower rates.
Region-by-Region Price Differences and What to Expect
Prices vary by region: metropolitan areas typically run 10%–40% higher than rural markets; coastal or high-cost states (CA, NY, MA) often exceed national averages by 20%–35%. Budget adjustments: add ~20% for West Coast and Northeast metro areas, subtract ~10% for lower-cost Midwest and rural markets.
Assumptions: regional labor multipliers, mid-range material costs, normal access.
Common Add-Ons, Removal Fees, and Job Time Estimates
Typical add-ons: register/boot replacement ($25-$200 each), transition collars ($10-$40), MERV filter checks or returns rebuild ($100-$500). Removal/disposal fees run $0-$200 depending on volume. Small jobs take 1–4 hours; full-system replacements take 6–12 hours or more with two techs.
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Assumptions: no major sheet metal fabrication, standard attic or crawl access.
Three Real-World Quote Examples With Specs and Pricing
| Scenario | Specs | Labor Hours | Per-Unit Rates | Total |
|---|---|---|---|---|
| Small condo run | 30 ft, 2 supply runs, 6″ flex | 2–3 hours | $10/ft material+install | $300-$450 |
| Average single-family | 150 ft, 6 runs, 8″ and 6″ mix | 6–8 hours | $6-$10/ft | $900-$1,500 |
| Large home redo | 350 ft, 12 runs, returns, boots rebuilt | 10–18 hours | $4-$8/ft | $1,400-$2,800 |
These examples reflect common combinations of material choice, access complexity, and labor time to help estimate real quotes.
Tips for Getting the Best HVAC Prices
- Prioritize Quality Over Cost
The most critical factor in any HVAC project is the quality of the installation. Don’t compromise on contractor expertise just to save money. - Check for Rebates
Always research current rebates and incentives — they can significantly reduce your overall cost. - Compare Multiple Quotes
Request at least three estimates before making your choice. You can click here to get three free quotes from local professionals. These quotes include available rebates and tax credits and automatically exclude unqualified contractors. - Negotiate Smartly
Once you've chosen a contractor, use the proven strategies from our guide — How Homeowners Can Negotiate with HVAC Dealers — to get the best possible final price.