What does ductwork cost? Nobody in the federal government measures it. No series tracks installed duct prices, because duct work is usually buried inside an equipment quote. The closest federal figures are construction cost estimates, and they are narrow.
Key Takeaways
- No federal series measures installed ductwork prices. EIA says its surveys “do not directly gather” equipment cost information.
- DOE’s 2024 IECC cost analysis prices a dropped ceiling at $8.78 per square foot, 2024 dollars, from RS Means.
- Moving all of a single family home’s ducts into conditioned space costs $1,222 there. Doing 80 percent costs $978.
- EIA’s only duct line item is commercial: ductwork on a 16,300 CFM air handler adds about $9,272 in 2022 dollars.
- ENERGY STAR: “about 20 to 30 percent of the air that moves through the duct system is lost due to leaks, holes, and poorly connected ducts.”
- Code sets two big drivers: R-8 supply duct insulation in unconditioned space and total leakage of 4 CFM25 per 100 square feet.
- On the BLS sheet metal producer price index, our arithmetic puts that $1,222 at $1,366 in August 2026 dollars.
Is there any federal data on ductwork cost?
Almost none. The federal government funds duct research, writes duct code and measures duct leakage, but collects no transaction prices for duct installation. EIA states the limit plainly in its March 2023 equipment cost study: its buildings surveys “do not directly gather other information that we need to project future energy consumption, such as equipment cost information.”
The gap is worse for ducts than equipment. A furnace is a shipped product with a model number, so rulemakings and price indexes touch it. A duct system is fabricated on site and folded into one proposal line, often the same line as the equipment itself.
That is why nearly every ductwork cost figure online comes from a contractor page or a lead generation site averaging its own quote requests. Those are not measurements. Where a number below could not be traced federally, we say so.
What ductwork cost figures does the government publish?
Two, and both are narrow. Pacific Northwest National Laboratory, working for DOE, prices the construction that relocates ducts. EIA prices ductwork once, for a commercial air handler.
PNNL’s January 2025 report on the 2024 IECC, PNNL-35986, costs the code credit for putting ducts inside the thermal envelope. The method is explicit: a dropped ceiling of 139.2 square feet, sized from the perimeter of DOE’s single family prototype house, at $8.78 per square foot of lumber, air barrier, drywall and labor from 2024 RS Means. That gives $1,222 for all the ducts and $978 at the 80 percent level, where the rate falls to $7.02 per square foot.
The EIA figure sits in the commercial half of the study that also prices residential ductless systems. For a 16,300 CFM constant air volume air handler, EIA writes that the unit installs for roughly $71,829 and “Ductwork would cost approximately $9,272 additional ($81,101 total),” on a 2022 RS Means basis.
How does a contractor build a ductwork cost estimate?
From quantities, not house square footage. A duct estimate is linear feet of trunk and branch, a material, an insulation level, a sealing method, a count of registers and returns, and an allowance for access. The federal record does not price those items, but defines most of them.
| Cost driver | What is actually counted | Where the requirement comes from |
|---|---|---|
| Trunk and branch length | Linear feet at each size, plus fittings and boots | Set by the design method, not by code |
| Rigid metal or flex | Fabricated sheet metal or insulated flex | Both permitted; friction rate differs |
| Insulation level | R-8 on supply ducts in unconditioned space, R-6 on returns | IECC Section 403.2 onward, per DOE Building America |
| Sealing method | Mastic or UL 181 tape at every joint | EPA ENERGY STAR duct guidance |
| Access | Opening and patching finished ceilings and walls | Job condition, least predictable line |
| Duct leakage test | Total leakage measured at 25 pascals | 4 CFM25 per 100 square feet, 2012 to 2021 IECC |
| Ducts inside the envelope | Dropped ceiling framing to keep ducts out of the attic | 2024 IECC credit R408.2.4, priced by PNNL |
Only the last row has a published federal price. The rest are priced from local labor and material rates, and they interact: a longer run raises the pressure the blower must overcome, pushing the design to larger trunks and more sheet metal. A load calculation sets both.
Why is ductwork cost lower during an equipment changeout?
Because the expensive access is already paid for. When an air handler comes out, plenums are open, the space is clear and the crew is on site with a permit pulled. Replacing duct runs then consumes labor that is partly sunk.
No federal source prices that difference, and we will not invent a percentage. The record does show the shape of the cost: in PNNL’s analysis the relocation charge is almost all framing, drywall and labor, not duct material. If the ducts are staying, testing and sealing the existing system is the smaller job, and whether a permit is required often decides whether a leakage test happens.
What does energy code add to a ductwork cost?
Two line items that are easy to underestimate: insulation and the leakage test. On insulation, DOE’s Building America Solution Center states that “the 2009 IECC (Section 403.2) requires that supply ducts located in unconditioned space be insulated to at least R-8 (return ducts can be insulated to R-6).”
On testing, Building America reports that the limits “have been very consistent requiring total duct leakage” at or under 4 CFM25 per 100 square feet of conditioned floor area from the 2012 IECC to the 2021 IECC, with a separate 8 CFM25 allowance where ducts and air handler sit entirely inside the thermal envelope. A failed test sends the crew back to seal, and that return visit is real money. Enforcement depends on the code edition your jurisdiction adopted.
The number that is not a duct price
Duct cleaning gets quoted in the same breath as duct replacement, and the two share nothing: cleaning is a service visit, replacement is fabrication, insulation, sealing and a test. See what EPA says about paying for cleaning.
What is the measurable payoff on duct work?
The clearest federal number is a loss, not a saving. ENERGY STAR states that “in a typical house, however, about 20 to 30 percent of the air that moves through the duct system is lost due to leaks, holes, and poorly connected ducts.” Its duct sealing flyer puts the efficiency effect at “as much as 20 percent.”
Dollar savings are thinner. A 2006 EPA fact sheet said tight, well insulated ducts in certified homes “can reduce annual utility bills by $120 or more” against more than $600 a year for space conditioning. That is a twenty year old figure against twenty year old bills, so we flag it as dated rather than escalate it. For your own number, a blower door and duct leakage test measures the loss in your house.
What is a 2024 ductwork cost worth in 2026 dollars?
Roughly 12 percent more on the sheet metal index. The BLS producer price index for sheet metal work manufacturing, series PCU332322332322, averaged 302.327 in 2024 and stood at 337.833 in August 2026, a preliminary value. That ratio is 1.117.
Applying it is our arithmetic, not DOE’s: $1,222 becomes about $1,366, $978 becomes about $1,093, and $8.78 per square foot becomes about $9.81. The EIA line is in 2022 dollars, where the index averaged 290.912, a ratio of 1.161, so $9,272 becomes about $10,767. That works out to $0.57 per CFM of design airflow in 2022 dollars, our division of EIA’s own numbers. A producer price index tracks factory gate sheet metal, not installed jobs, so treat these as direction rather than a quote.
What these ductwork cost figures are not
They are not a price for a whole new duct system. The PNNL numbers price framing that moves ducts inside the envelope of a new single family house built to DOE’s prototype. They exclude duct material, insulation, registers and the leakage test, and they describe no retrofit. For the full system, see what a duct system built to a standard requires.
The EIA line is commercial. A 16,300 CFM air handler is roughly ten times a residential system by airflow, so the $9,272 does not scale down by division. Both reports also price from RS Means, a construction cost database, not a survey of what buyers paid. Insulation interacts with the house, so how much attic insulation your climate zone needs changes how punishing an attic run is.
None of these figures tell you whether your ducts are the problem. Airflow per ton is the diagnostic, and the 400 CFM per ton rule is where a technician starts. Envelope work precedes duct work, hence insulating before sizing.
How we researched this
Research date: September 29, 2026. We searched for a federal series on installed duct prices, found none, then worked outward to federal cost analyses holding duct line items. Cited: PNNL-35986 (January 2025, 2024 dollars), the EIA equipment cost study (March 2023, 2022 dollars), ENERGY STAR duct sealing guidance, a 2006 EPA duct fact sheet, two DOE Building America guides, and BLS series PCU332322332322 (August 2026, preliminary).
Consulted and excluded: the ORNL national evaluations of the Weatherization Assistance Program, which report whole job costs with no duct line item; NREL’s measure guideline on sealing and insulating ducts, unreachable from this network and so not cited; and every contractor or lead generation page carrying per linear foot duct pricing. Freshness: two cited sources are from 2025 or 2026, four from 2006 to 2023. We revisit when PNNL publishes the next IECC cost analysis. All escalation arithmetic is ours and labelled. User forums were not used.
Frequently asked questions
Is there an official average ductwork cost in the United States?
No. No federal agency collects installed duct prices, and duct work is normally bundled into one line on an equipment proposal. EIA says its surveys do not directly gather equipment cost information. The closest federal figures are construction cost estimates for single measures, such as PNNL’s $1,222 for moving a home’s ducts into conditioned space in 2024 dollars.
How much does it cost to move ducts into conditioned space?
DOE’s Pacific Northwest National Laboratory estimates $1,222 for a single family house, from a 139.2 square foot dropped ceiling at $8.78 per square foot of materials and labor in 2024 RS Means. The 80 percent version is $978, or $7.02 per square foot. Both are new construction estimates, not retrofit quotes.
Does energy code require a duct leakage test?
In most adopted editions, yes. The DOE Building America Solution Center reports that total duct leakage limits held at 4 CFM25 per 100 square feet of conditioned floor area from the 2012 IECC through the 2021 IECC, with an 8 CFM25 allowance where ducts and air handler sit inside the thermal envelope. Enforcement depends on the adopted code.
What insulation do ducts in an attic need?
Building America restates the rule as at least R-8 on supply ducts in unconditioned space and R-6 on returns, starting with the 2009 IECC, Section 403.2. Attics, crawl spaces, unconditioned basements and garages all count as unconditioned. Insulating a long attic trunk is one line item that separates a code compliant quote from a cheap one.
Is rigid metal duct more expensive than flexible duct?
No federal source prices either material, so we publish no comparison. Both are permitted, and EPA recommends mastic or UL 181 listed tape rather than standard duct tape on either. Price differences between fabricated sheet metal and insulated flex come from local fabrication and labor rates.
How much air do leaky ducts actually lose?
ENERGY STAR states that in a typical house about 20 to 30 percent of the air moving through the duct system is lost to leaks, holes and poorly connected ducts. Its flyer adds that leaky ducts can cut heating and cooling efficiency by as much as 20 percent. Both are national generalizations, not measurements of your house.
Sources
- U.S. Energy Information Administration. “Updated Buildings Sector Appliance and Equipment Costs and Efficiencies.” https://www.eia.gov/analysis/studies/buildings/equipcosts/pdf/full.pdf Accessed September 2026.
- Pacific Northwest National Laboratory. “PNNL-35986: National Cost-Effectiveness of the Residential Provisions of the 2024 IECC.” https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-35986.pdf Accessed September 2026.
- ENERGY STAR. “Duct Sealing.” https://www.energystar.gov/saveathome/heating-cooling/duct-sealing Accessed September 2026.
- ENERGY STAR. “Duct Sealing with ENERGY STAR.” https://www.energystar.gov/sites/default/files/asset/document/ES_Duct_Sealing_flyer.pdf Accessed September 2026.
- U.S. Environmental Protection Agency, ENERGY STAR. “Efficient Duct Systems.” https://www.energystar.gov/ia/new_homes/features/DuctSystems_062906.pdf Accessed September 2026.
- DOE Building America Solution Center. “Sealed and Insulated Metal Ducts.” https://basc.pnnl.gov/resource-guides/sealed-and-insulated-metal-ducts Accessed September 2026.
- DOE Building America Solution Center. “Duct Leakage Tests.” https://basc.pnnl.gov/resource-guides/duct-leakage-tests Accessed September 2026.
- U.S. Bureau of Labor Statistics. “PPI by Industry: Sheet Metal Work Manufacturing (PCU332322332322).” https://data.bls.gov/timeseries/PCU332322332322 Accessed September 2026.
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