A spiral duct price list typically shows material at $4-$12 per linear foot, while installed ductwork often runs $12-$30 per linear foot. Total price depends on duct diameter, metal gauge, fittings, ceiling access, finish, and local labor rates.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Spiral duct material | $4 per linear ft | $7 per linear ft | $12 per linear ft | Common galvanized steel sizes |
| Installed straight run | $12 per linear ft | $20 per linear ft | $30 per linear ft | Standard access and basic supports |
| Fittings and transitions | $15 each | $45 each | $150 each | Price varies by type and diameter |
| Small project total | $1,200 | $3,000 | $6,500 | About 50-200 linear ft, installed |
Assumptions: U.S. pricing for common galvanized steel duct, ordinary access, and standard commercial or residential HVAC work. Estimates exclude major equipment replacement.
What Spiral Ductwork Costs for Typical HVAC Runs
For a straightforward project, spiral duct material costs about $4-$12 per linear foot, before fittings, hangers, or installation. A contractor-installed run commonly totals $12-$30 per linear foot. A short 50-foot run may cost $1,200-$2,500, while 200 feet with several branches can reach $4,000-$8,000.
A practical budget for a modest, accessible project is around $3,000, but the number of branches and site conditions can move it substantially. These ranges assume standard galvanized steel, ordinary ceiling height, and no major electrical, structural, or HVAC redesign. Decorative finishes or hard-to-reach ceilings can push the price above the high range.
How Sheet Metal, Labor, and Lift Charges Shape Quotes
Quotes usually separate duct, fittings, installation, and job-site expenses. Material pricing rises with diameter and heavier gauge; labor covers layout, hanging, sealing, and connections. A lift rental or disposal charge may appear when existing duct is removed or the ceiling is high.
| Quote component | Typical price | What it covers | Common cost condition |
|---|---|---|---|
| Straight duct material | $4-$12 per linear ft | Galvanized spiral pipe | Diameter and gauge |
| Fittings | $15-$150 each | Elbows, tees, reducers | Custom or large fittings |
| Installation labor | $50-$110 per worker-hour | Layout and hanging | Access and crew productivity |
| Lift or access equipment | $150-$500 per day | Rental and delivery, when needed | Ceiling height and site rules |
| Removal and disposal | $2-$6 per linear ft | Taking out old duct | Material and disposal distance |
Labor can represent a large share of the installed quote, especially when the route requires repeated overhead work. A two-person crew working 10-16 hours at combined labor billing of $100-$220 per crew-hour would add roughly $1,000-$3,520 before material and equipment.
Why Diameter, Gauge, and Run Length Change the Price
Duct diameter affects both material use and fitting cost. Common 6-10-inch duct may fall near $4-$8 per linear foot for material, while 12-18-inch duct can run about $7-$15. Larger trunks, such as 20-24 inches, may exceed $15 per foot, especially when made to order.
Gauge also matters. Standard residential and light-commercial work often uses 26- to 24-gauge steel, while larger diameters or demanding applications may call for heavier 22- or 20-gauge material. A heavier gauge can add roughly 15%-40% to the duct material cost. Runs longer than 100 feet may benefit from simpler, continuous routing; numerous turns, branches, or diameter changes increase fitting and labor charges.
Diameter, metal thickness, and fitting count should be listed clearly on the estimate so that competing quotes describe the same system. A low price based on a smaller diameter or lighter gauge is not directly comparable to a quote that meets specified airflow and code requirements.
How Many Labor Hours Does a 1,000-Square-Foot System Need?
A simple exposed layout serving a 1,000-square-foot space might use 80-140 linear feet of duct and take a two-person crew about 12-24 hours. At $50-$110 per worker-hour, labor would be roughly $1,200-$5,280. The range reflects differences in access, support spacing, connection details, and crew rates.
Work above an open ceiling is generally faster than installation through finished walls or tight attic spaces. A ceiling higher than 12 feet may require a lift and slower positioning; work above 18 feet can add rental time and extra labor. These estimates exclude HVAC equipment setup, balancing, and unrelated electrical work.
Ask whether the estimate includes hangers, sealing, supports, lift time, and final airflow adjustments. Missing scope items can make an initially lower bid more expensive once the job is underway.
Regional Spiral Duct Rates from City Centers to Rural Areas
Installed prices vary with local wages, contractor availability, travel, and permitting. Large coastal metro areas can be about 15%-30% above the national midpoint, while lower-cost markets may be 10%-20% below it. Rural jobs can have lower labor rates but higher mobilization charges when the contractor travels a long distance.
For a 100-foot run that might cost about $1,200-$3,000 in a typical market, a high-cost metro quote could be approximately $1,400-$3,900. A lower-cost area might land near $1,000-$2,500, before unusual access or removal charges. Compare local bids on the same duct size, gauge, fitting count, and finish rather than relying on a national per-foot average.
Three Installed Spiral Duct Quotes for Different Project Sizes
| Project example | Scope and labor | Estimated total | Approximate rate |
|---|---|---|---|
| Small workshop | 60 ft of 8-inch duct, 4 fittings, 10 crew-hours | $1,300-$2,300 | $22-$38 per ft |
| Open retail space | 140 ft of 10- to 12-inch duct, 10 fittings, 20 crew-hours | $3,200-$5,800 | $23-$41 per ft |
| Warehouse branch network | 300 ft of 12- to 18-inch duct, 18 fittings, 40 crew-hours | $7,000-$13,500 | $23-$45 per ft |
Assumptions: Standard galvanized duct, regional labor billed at $50-$110 per worker-hour, accessible work area, and no major demolition or design changes.
Per-foot totals are higher on small jobs because mobilization, setup, and minimum labor charges are spread over fewer feet. Large projects can still exceed the example range if they need engineered supports, fire-rated assemblies, unusual diameters, or extensive balancing.
Which Duct Finishes and Fittings Add to the Bill?
Standard galvanized duct is usually the economical choice. Paint-ready or factory-painted duct may add about $2-$6 per linear foot, while stainless steel can cost several times more and is generally specified for particular environments. A visible finish may also require careful handling to avoid scratches.
Elbows, tees, reducers, end caps, and takeoffs can add $15-$150 each, with large or custom parts costing more. Insulation may add around $2-$6 per linear foot, depending on thickness and vapor barrier. Fire dampers, access doors, and controls are separate items and should be priced by size and code requirement.
Confirm whether the listed price includes every fitting and finish needed for a complete run. A duct-only material list can look inexpensive while leaving out the parts that make the system installable and code-compliant.
How to Lower the Price Without Undersizing the Duct
Keep the route direct, group branches where possible, and finalize outlet locations before fabrication. Fewer offsets and custom transitions can reduce both fitting charges and installation time. Avoid changing the layout after duct is ordered, since revised pieces may incur fabrication and restocking costs.
Request itemized bids from at least two or three contractors and compare diameter, gauge, insulation, supports, removal, and labor assumptions. If replacing an existing system, ask whether usable sections can remain, but do not reuse duct that is damaged, contaminated, improperly sized, or unsuitable for the new airflow needs.
The safest savings come from simplifying the route and comparing identical specifications, not from reducing duct size below the HVAC design. A contractor can confirm required airflow and applicable local code before the material order is placed.