Duct installation typically costs $2,000-$10,000 for a home project, with many standard replacements averaging about $5,500. The final price depends on home size, duct material, access, layout changes, and whether the job includes removing old ducts or adding new HVAC equipment.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Whole-home duct installation | $2,000 | $5,500 | $10,000 | Typical 1,500-2,500 sq ft home |
| Duct replacement per sq ft | $2 | $4 | $7 | Installed, standard access |
| New duct run | $250 | $550 | $1,000 | Per run, including basic fittings |
| Labor | $50/hr | $85/hr | $130/hr | Per technician-hour |
Typical duct installation prices by home size
For a partial replacement or a straightforward new layout, homeowners commonly pay $2,000-$5,000. Replacing most or all ductwork in a 1,500-2,500-square-foot home often runs $4,000-$8,000; complex projects in larger homes can reach $10,000-$15,000 or more. Installed pricing commonly works out to $2-$7 per square foot of conditioned floor area, though contractors may price by duct length and number of supply and return runs instead.
A standard full replacement averages about $5,500 when the existing layout is usable and access is ordinary. These ranges assume typical residential materials and do not include a new furnace or air conditioner. Assumptions: U.S. labor rates, standard-grade ductwork, no major framing repairs, and normal access.
What sheet metal, flex duct, and labor add to a quote
Quotes combine duct materials, installation labor, fittings, sealing, and sometimes removal or testing. Sheet-metal duct is durable and often costs more to fabricate and fit; flexible duct can be less expensive for suitable short runs but must be supported and installed carefully to avoid airflow restrictions.
| Quote component | Typical price | What it covers | Cost note |
|---|---|---|---|
| Flexible duct | $1-$4 per linear ft | Duct material | Installed cost is higher |
| Sheet-metal duct | $3-$10 per linear ft | Metal sections and fabrication | Custom fittings can raise price |
| Labor | $50-$130 per hour | Layout, hanging, connections | Access and crew time matter |
| Removal and disposal | $300-$1,500 | Old ductwork and haul-away | Depends on volume and access |
| Testing and balancing | $150-$600 | Airflow checks and adjustments | May be included in larger jobs |
Labor and access often account for as much of the quote as the duct material itself. A basic labor estimate can be checked with ; for example, 30 technician-hours at $85 per hour equals $2,550 before materials and other charges.
How duct length, home size, and crawlspace access change cost
More conditioned floor area generally requires more supply runs, return capacity, and total duct length. A 1,000-square-foot home may need a simpler system than a 2,500-square-foot home, but the existing HVAC layout and room count also affect the design. Adding one run to serve a new room may cost $250-$1,000, depending on distance, fittings, and whether the system can support the added airflow.
Longer runs and hard-to-reach spaces can raise labor costs even when the home is relatively small. Attics and open basements are usually easier to work in than tight crawlspaces or finished ceilings. If access requires opening and patching drywall, budget an additional $300-$2,000 or more, depending on the number and size of openings.
System capacity and duct sizing also matter. A 2-ton HVAC system and a 5-ton system do not use identical duct dimensions or airflow plans; undersized ducts can create noise and poor comfort. Quotes should identify the system capacity, duct sizes, number of runs, and whether airflow calculations or balancing are included.
When replacement scope includes removal or HVAC changes
Replacing accessible ducts while keeping the existing layout is generally less expensive than redesigning the system or moving registers. Old insulation, damaged sections, contamination concerns, and difficult disposal can add charges. If a contractor proposes replacing the furnace or air conditioner at the same time, the equipment should be priced separately so the ductwork estimate remains clear.
Separate ductwork, equipment, drywall, and disposal charges before comparing bids. A quote that includes removal and sealing may look higher than one that leaves old ducts in place, so compare the same scope rather than just the total.
Three ductwork quotes for common home projects
| Project example | Scope and labor | Estimated total |
|---|---|---|
| Small addition | Two runs, 15-25 linear ft, 6-10 labor hours | $700-$1,800 |
| Partial replacement | About 600 sq ft of duct area, 18-30 labor hours | $2,500-$5,000 |
| Full replacement | 2,000 sq ft home, 35-60 labor hours, removal included | $5,000-$9,500 |
These examples assume standard residential materials and no major access repairs. Labor hours refer to combined technician time; crew size and scheduling affect calendar duration. Use the examples as comparison points, not fixed bids.
Why duct installation quotes vary across U.S. regions
Local wages, housing types, permits, and contractor availability create regional differences. As a broad comparison, labor-heavy projects in major coastal metro areas may run 15%-30% above a national midpoint, while some lower-cost rural markets may come in 10%-20% below it. These are planning adjustments, not guaranteed local rates; a remote property can also incur travel or delivery charges.
Older homes may need more fitting work or access openings than newer homes with accessible mechanical spaces. Ask local contractors whether their estimate includes inspection or permit fees, since requirements vary by jurisdiction and the work being performed.
How to lower the ductwork price without cutting airflow
Keep the quote focused on the actual problem. If ducts are intact and the issue is limited to a few leaks or damaged sections, ask whether targeted sealing or repair is feasible before approving full replacement. For a new addition, confirm that the existing HVAC system has capacity before adding runs; a larger duct system alone cannot fix an undersized heating or cooling unit.
Compare at least three itemized quotes with the same duct material, run count, removal, sealing, and testing scope. Clear attic or basement access before work begins, bundle duct changes with planned renovation work when practical, and avoid upgrades that do not address a documented comfort or efficiency need.
Request the proposed duct sizes, materials, insulation level, and any airflow testing in writing. A low bid that omits return ducts, disposal, or balancing may cost more after change orders; a detailed scope helps reveal whether the price is genuinely lower.