Buyers comparing rigid vs flex duct cost typically pay more for rigid metal runs but may face higher labor on complex installs; main drivers are run length, diameter, number of boots, and access. This article gives realistic price ranges in USD and explains which factors move a quote up or down for residential HVAC ductwork.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Rigid Sheet Metal Duct (per linear ft) | $8 | $12-$18 | $25 | Assumptions: 6″–12″ round-to-rect mix, Midwest labor, standard access. |
| Flexible Duct (per linear ft) | $2 | $4-$9 | $15 | Assumptions: insulated R6 flex, typical attic run. |
| Supply Boot / Register Install (per boot) | $35 | $75-$125 | $200 | Includes collar, collar seal, and register hookup. |
| Whole-System Rework (average 3-4 vents) | $450 | $900-$1,800 | $3,500 | Includes short runs, basic balancing. |
Content Navigation
- Typical Total Price for Rigid and Flexible Duct Runs
- Price Breakdown by Materials, Labor, Equipment, and Disposal
- How Length, Diameter, and Access Change the Final Quote
- Practical Ways to Lower Rigid vs Flex Duct Pricing
- Regional Price Differences Between Urban, Suburban, and Rural Installations
- Typical Labor Time, Crew Size, and Hourly Rates to Budget
- Common Add-Ons, Removal Fees, and Three Real-World Quote Examples
Typical Total Price for Rigid and Flexible Duct Runs
A straight 20-foot supply run in a typical attic costs about $80-$360 depending on material and labor.
Rigid duct total: $160-$500 for a 20-ft run (20 ft × $8-$25/ft) including seams, fasteners, and basic sealing. Flexible duct total: $40-$300 for the same 20 ft (20 ft × $2-$15/ft) assuming R6 insulation and one connection. Assumptions: single supply, normal attic access, no major demolition.
Price Breakdown by Materials, Labor, Equipment, and Disposal
Materials usually represent 25%-45% of the invoice for rigid runs and 15%-35% for flex runs; labor drives the remainder.
| Cost Component | Rigid Duct | Flexible Duct | Typical % of Total | Notes |
|---|---|---|---|---|
| Materials | $8-$15/ft | $2-$6/ft | 25%-45% | Sheet metal, elbows, sealant vs insulated flex. |
| Labor | $75-$125/hr | $50-$100/hr | 40%-60% | Cuts, fittings, sealing, testing. |
| Equipment | $30-$150 one-time | $0-$50 one-time | 5%-10% | Crimps, drive-on stands, lifts for metal runs. |
| Delivery/Disposal | $0-$200 | $0-$100 | 2%-8% | Old duct removal or packaging fees. |
| Overhead/Permits/Testing | $50-$300 | $50-$200 | 5%-15% | Permit needs vary by locality. |
How Length, Diameter, and Access Change the Final Quote
Length, duct diameter, and access complexity are the single biggest price levers; expect step changes at 25 ft, 50 ft, and for diameters over 12 inches.
Example drivers: runs under 25 linear ft keep labor low; 25-50 ft increases labor by ~15%-30%; over 50 ft often needs extra supports or splice fittings adding $50-$250. Duct diameter: 6-8″ common is standard pricing, 10-12″ raises material and handling by 10%-25%, and >14″ may require custom fabrications or sheet-metal crews.
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Access: attic with full clearance is baseline; tight crawlspaces or finished ceilings add $100-$500 in labor per problematic run.
Practical Ways to Lower Rigid vs Flex Duct Pricing
Controlling run length, minimizing transitions, and scheduling during off-season typically shave 10%-25% from quotes.
Specific actions: consolidate runs to reduce total linear feet, choose R6 flex where allowable instead of sheet metal for short runs, provide clear attic access before crew arrival to avoid prep fees, and accept contractor bundles (ductwork + system tune-up) for reduced combined labor. For small repairs, repair a damaged section of rigid duct instead of full replacement when sealing and patching is viable.
Regional Price Differences Between Urban, Suburban, and Rural Installations
Expect 10%-30% higher labor rates in large metro areas compared with rural markets; material deltas are usually 0%-10%.
Urban (NYC, LA, Chicago): labor premiums push hourly rates to $100-$150/hr for sheet-metal crews. Suburban: typical rates $75-$125/hr. Rural: $50-$90/hr. Shipping or supply scarcity can add another 5%-15% in remote areas.
Typical Labor Time, Crew Size, and Hourly Rates to Budget
Simple single-run installs: 1-2 hours for flex, 3-6 hours for rigid; full small-system rework usually 8-24 hours with 2-3 crew members.
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Labor examples: installing four 10-ft flexible runs: 3-6 labor hours (one tech). Replacing equivalent rigid runs: 8-16 labor hours (two techs). Plan for minimum dispatch fees of $75-$150 in many markets.
Common Add-Ons, Removal Fees, and Three Real-World Quote Examples
Removal, balancing, and testing often add $150-$600 to a base duct replacement quote.
| Scenario | Specs | Labor Hours | Materials | Total |
|---|---|---|---|---|
| Quote A — Small Flex Patch | Two 12-ft flex runs, attic | 2 hrs | $80 | $200-$350 |
| Quote B — Rigid Convert (3 runs) | Three 20-ft mixed dia, attic | 12 hrs (2 techs) | $480 | $1,200-$2,200 |
| Quote C — Whole First-Floor Rework | 8 supply + 3 return, mixed rigid/flex | 24 hrs (3 techs) | $1,200 | $2,800-$5,500 |
Assumptions: quotes include basic sealing and registers, exclude major ductboard replacement or HVAC unit change.
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.