Buyers typically pay between $2 and $25 per linear foot for HVAC ductwork depending on material, diameter, insulation, and labor. This duct cost per foot summary shows low-average-high ranges and the main drivers contractors use when pricing a run.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Basic Spiral Metal Duct | $2.00/ft | $4.50/ft | $8.00/ft | Assumptions: 6-12″ diameter, uninsulated, good access. |
| Rigid Rectangular Sheet Metal | $4.50/ft | $7.50/ft | $15.00/ft | Assumptions: custom fittings, 10-20 ft runs. |
| Insulated Flexible Duct | $3.50/ft | $6.50/ft | $12.00/ft | Assumptions: R4-R8, residential attic runs. |
| Register-to-Register Branch (average room) | $50 | $150 | $400 | Includes boots, connectors, balancing dampers. |
Average Total Price For A Typical 1,500 sq ft Home Duct Run
A full new duct installation for a 1,500 sq ft single-family home usually totals $2,500-$8,000, with an average near $5,000 for mixed spiral and flexible runs. Average per-foot pricing in that job typically works out to $3.50-$6.00 per linear foot including materials and labor.
Assumptions: Midwest labor, 8-12 registers, 40-120 linear feet of main and branches, basic insulation, normal attic/crawl access.
Material, Labor, Equipment, and Disposal Line-Item Pricing
| Materials | Labor | Equipment | Delivery/Disposal | Overhead |
|---|---|---|---|---|
| $1.00-$6.00/ft (spiral, flex, sheet metal) | $1.00-$8.00/ft ( typical) | $50-$250 per day (crane/ladder rental) | $0.10-$0.50/ft or $75-$250 minimum | 10%-25% of subtotal |
Materials and labor are the two largest pieces of any duct quote; materials often dominate small jobs while labor dominates complex retrofits.
How Diameter, Sheet Metal Gauge, And Run Length Change The Quote
Small 4-6″ flexible runs cost $2.50-$6/ft; 8-12″ spiral mains $2-$6/ft; large rectangular trunks 14-30″ can be $10-$25/ft because of custom fabrication. Long continuous runs over 50 linear feet often reduce per-foot material cost but add labor for staging and sealing, shifting the job toward higher labor percentages.
Gauge matters: 26-gauge duct is inexpensive; 20-18 gauge sheet metal adds $1-$4/ft depending on size and stiffness required. Assumptions: quoted gauges refer to steel for rectangular ducts; larger diameter rounds use spiral tubing pricing.
Ways To Cut Duct Installation Price On New Or Replacement Jobs
Consolidate runs, minimize rectangular trunking, and accept pre-insulated spiral or flex where appropriate to lower costs. Reducing total linear footage by 10-20% (better register placement) typically saves 8%-15% on a final quote.
Additional levers: schedule during off-season, provide clear attic access, and complete demo/clean-up work yourself to shave labor hours and disposal fees.
Regional Price Differences Between Urban, Suburban, And Rural Markets
Urban areas with higher labor rates (coastal cities) run 10%-35% above national average; suburban markets are near average; rural can be 5%-20% lower but may include travel minimums. Expect a 20%-30% premium in high-cost metros versus a Midwest or South suburban market.
Assumptions: premiums reflect wage and permit differentials, not extraordinary site logistics.
Typical Labor Time, Crew Size, And Hourly Rates For Duct Work
Simple branch installs for one room take 2-6 hours for a 1-2 person crew; a full system replacement often requires 2-4 techs for 1-3 days. Common labor rates run $75-$125 per hour for installers and $90-$150 per hour for lead techs or foremen.
Add-Ons, Sealing, Insulation, And Removals That Increase The Final Price
Sealing supply/return seams with mastic or aerosol mastic costs $0.50-$2.50/ft extra; adding R6-R8 insulation adds $1-$4/ft. Removing old ductwork adds $50-$400 depending on accessibility and asbestos/containment requirements.
Additional items that raise price: balancing dampers ($25-$75 each), sound attenuation ($30-$200 per run), and R-value upgrades for unconditioned attics.