Dryer Vent Cleaning vs. Replacement: When to Do Which

Cleaning: The Yearly Routine

Professional dryer vent cleaning uses a rotary brush and vacuum to remove lint from the full run — from behind the dryer to the exterior vent hood. It's fast (30–60 minutes), affordable ($120–$250), and required annually per manufacturer warranties.

Cleaning restores airflow, cuts drying time, and reduces fire risk — but it can't fix a physically damaged duct.

Signs You Need Replacement, Not Cleaning

Flexible foil or plastic duct: banned by every modern building code. Replace with rigid or semi-rigid aluminum.

Kinks, crushes, or sharp bends: reduce airflow permanently and trap lint even right after cleaning.

Runs longer than 25 feet (minus 5 ft per 90° elbow): exceed code and manufacturer limits — reroute or install a booster fan.

Torn or disconnected sections inside a wall: dumping hot lint into the wall cavity is a fire risk.

Missing exterior vent hood or damaged flapper: birds, rodents, and rain get in.

What Replacement Costs

A standard rigid metal dryer duct replacement in DFW runs $250–$650 depending on run length, wall/ceiling access, and whether re-routing is needed. Complex reroutes with new roof or wall penetrations run $700–$1,500.