Free · no signup · no contractor calls · Updated July 2026
Ductwork Replacement Cost Calculator
Ductwork replacement costs $1,400–$6,000 for a typical home in 2026 (about $15–$30 per linear foot with old-duct removal). Partial replacement runs $1,400–$3,500; a full-home replacement $3,000–$6,000; with asbestos or mold remediation $4,000–$10,000. Use the calculator below for a figure matched to your home.
Educational calculators — always consult a licensed professional before making financial decisions.
Mid-size home, 3–4 bedrooms. Typically needs a 3–3.5 ton unit.
All ductwork runs in a single horizontal plane. Simpler and faster to install.
Galvanized steel ducts. Best airflow, longest lasting (20–30+ years), most expensive.
Open attic or unfinished basement. Contractors can work freely; minimal drywall work.
Home built after 1980 or already passed asbestos inspection. No abatement needed.
Estimated replacement cost
$3,200 – $6,200
~200 linear feet replaced
Cost Breakdown
Where Your Money Goes
Your Selections
Estimates based on national averages. Actual costs vary by region and contractor.
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What you'll need
- ·Duct system square footage
- ·Current duct material and condition
- ·Whether asbestos remediation is needed
- ·New material preference
What you'll get
- ✓Total replacement cost — Removal + new install
- ✓Asbestos remediation cost — If applicable
- ✓Labor breakdown — By job complexity
- ✓Material comparison — Cost by duct type
How it works
Assess current ductwork
Identify whether you need partial or full replacement, and check for asbestos in pre-1980 homes.
Enter home size
Input square footage — this determines the total linear footage of ducts to replace.
Choose new material
Flexible duct is cheapest; sheet metal is most durable and efficient.
When Should You Replace Your Ductwork?
Age
Ductwork older than 15–20 years may have deteriorated seals and joints.
Energy Bills
Rising energy bills with no HVAC changes often signal duct leaks.
Airflow Issues
Rooms that never reach the right temperature may have damaged ducts.
Methodology & sources
The cost figures on this page are generated from a single, sourced cost-data file (Removing old ducts and installing new in a typical 2,000 sq ft home — about 200 linear ft of duct, at 0.10 linear ft per sq ft of conditioned space. A full-home replacement runs $15–$30 per linear ft including removal and disposal; partial replacements cover less duct. National average estimate for 2026.). A full-home replacement runs $15–$30 per linear ft including old-duct removal and disposal. At the calculator's defaults (sheet metal, average access) a 2,000 sq ft home returns $3,500–$6,800, within about 15% of that band; flexible duct returns $2,500–$5,200, inside it. Asbestos-containing duct wrap requires abatement, which adds cost. The duct-run length is estimated from floor area; a real layout comes from an ACCA Manual D design, and the multi-storey uplift the calculator applies is our own planning adjustment, not an external figure. Last verified July 2026.
- HomeGuide — Ductwork Replacement Cost (2026) — retrieved 2026-07-13
- Angi — Air Duct Replacement Cost (2026) — retrieved 2026-07-13
- RemodelingCalculator — Cost to Replace Ductwork (duct-length rule of thumb: 1 linear ft per 10 sq ft of conditioned space) — retrieved 2026-08-06
- Fixr — Cost to Install Ductwork (basis: a 2,500 sq ft home requiring 275 linear ft of duct) — retrieved 2026-08-06
Frequently asked questions
How much does ductwork replacement cost?+
Ductwork replacement costs $1,400–$6,000 for a typical home. A 2,000 sq ft home carries roughly 200 linear feet of duct — about 0.10 linear feet per square foot of conditioned space — and a full-home replacement runs $15–$30 per linear foot including old-duct removal, new duct, and sealing, or $3,000–$6,000. Partial replacement of problem sections covers less duct and costs $1,400–$3,500. A replacement that also needs asbestos or mold remediation runs $4,000–$10,000 all in. Prices vary by material choice and accessibility.
How long does ductwork last?+
Sheet metal ductwork lasts 25–30 years with minimal maintenance. Flexible duct lasts 10–25 years depending on installation quality. Fibrous glass duct board lasts 15–20 years. Signs of aging include visible deterioration, excessive leakage in testing, disconnected joints, collapsed sections, or pest damage. Older homes with original ductwork should be inspected when the HVAC system is replaced.
Can old ductwork contain asbestos?+
Ductwork in homes built before 1980 may have asbestos-containing insulation on the ducts or asbestos tape at joints. Duct tape and fibrous insulation wrap from this era commonly contained asbestos. If you have older ductwork that hasn't been tested, have it inspected before any work. Abatement must be done by licensed professionals, and a duct replacement that includes it runs $4,000–$10,000 all in.
Should I replace ductwork when replacing HVAC?+
Replace ductwork at the same time as HVAC if: ducts are over 20 years old, testing shows more than 15% leakage, there are disconnected or collapsed sections, ducts are undersized for the new system, or asbestos is present. If ducts are less than 15 years old and in good condition, sealing leaks and cleaning the ducts before the new system is usually sufficient.
Want to try different numbers?
Back to the calculator ↑Ductwork Replacement Cost Calculator is built and maintained by the RealCostIQ editorial team. Cost ranges and rates are checked against published industry data and contractor quotes, and revised when the underlying figures move. Read our data methodology or more about who builds this. Every calculation runs in your browser — no account, and none of your inputs are stored.
Cost ranges and rates here are checked against contractor quotes and published industry data. If a number still looks off, email Support@RealCostIQ.com and we'll review and fix it.