Cost Comparison: Metal Duct Versus Flex Duct Installed Price and Ranges

Typical buyers choosing between metal duct and flex duct want clear installed cost ranges and the drivers behind price differences; this article lists what the average U.S. homeowner pays and the main cost drivers that affect the final cost. The cost of metal duct vs flex duct depends on material, run length, number of branches, and labor access.

Typical Installed Price For Metal Ductwork Vs Flex Duct

Sheet metal ductwork installed for a typical single-family home commonly runs $800-$6,000 total depending on scope; flex duct installs are roughly $350-$3,000. Homeowners replacing a single run or small attic run should expect flex to be the lower-cost option in most cases. Assumptions: Midwest labor rates, standard materials, normal attic/crawl access.

Breakdown Of Material, Labor, And Equipment Costs

The quote generally separates materials, labor, and equipment; materials and labor are the biggest line items for both metal and flex ducts. Expect labor to be 45%-65% of the installed price for metal duct and 30%-50% for flex in standard jobs.

How Run Length, Duct Diameter, And Number Of Vents Change The Quote

Longer runs, larger diameters, and more branches drive up both materials and labor; for example, each additional linear foot of 6″ flex is about $1.50-$4, while each linear foot of 10″ sheet metal can be $6-$15. When total main run length exceeds 50 linear feet or when ducts exceed 12″ diameter, expect a 20%-60% price increase due to heavier gauge metal and larger fittings.

Practical Ways To Lower Ductwork Price On Replacement Jobs

Scope control and prep work reduce cost: keep existing plenums if possible, clear attic access, combine multiple runs in one visit, and accept standard insulation levels rather than premium. Providing clear attic access and removing old insulation or debris before the crew arrives can cut labor hours and save 10%-20% on the labor portion of the quote.

Regional Price Differences Between Urban, Suburban, And Rural Markets

Labor and permit costs vary by region; urban markets and high-cost coastal areas run 15%-40% higher than Midwest averages, while some rural areas may be 10%-25% lower. Expect quotes in coastal metro areas to be roughly 1.2×–1.4× Midwest prices for both metal and flex duct installs. Assumptions: compares typical contractor hourly rates and permit fees.

Extra Charges To Watch For: Fittings, Removal, And Access Work

Common add-ons include collars, elbows, volume dampers, drywall patching, old duct removal, and insulation. Typical add-on ranges: fittings $25-$150 each, drywall repair $150-$500, old duct removal $100-$600 depending on accessibility.

Three Real-World Quote Examples With Specs And Totals

Example quotes help translate ranges into real scenarios and show typical labor hours and unit rates. These examples use real-sized jobs to help budget for comparable homes.