What dryer vent means
The dryer vent is the duct that carries hot, lint filled air from a clothes dryer to the outside.
Also called dryer exhaust duct.
Where it matters on a duct and dryer vent cleaning job
Lint build up in long or crushed vents makes dryers slow and is a fire risk. Cleaning is quick, recurring work. Measure the run and count the bends, because long runs may need a booster fan or a reroute.
What the model code says
- The maximum dryer exhaust duct length is 35 feet, reduced for fittings, unless the maker allows more. (IRC 2021, Chapter 15)
- The duct is 4 inches nominal, smooth metal. (IRC 2021, Chapter 15)
Check which code edition your building department enforces for dryer vent before you quote.
What it costs
For dryer vent, the closest koira.ai price is the dryer vent cleaning cost guide, near $150 for a typical job and $100 to $190 for most. The guide shows its sources and what moves the price. The dryer vent cleaning cost calculator prices a job line by line.
Work it out
- Free calculator: Dryer vent cleaning cost calculator
- Cost guide: Dryer vent cleaning cost
- Tools, templates and guides: Free duct and dryer vent cleaning resources
Sources: 2021 International Residential Code, Chapter 15, Exhaust Systems (ICC). Checked October 9, 2026.