Lint Is the Fuel in Most Dryer Fires
The U.S. Fire Administration, drawing on national fire incident data, reports that failure to clean was the leading factor contributing to home clothes dryer fires from 2018 to 2020, at 31 percent. Lint burns easily, and a clogged vent traps the heat that lights it.
Signs Your Dryer Vent Is Clogged
- Normal loads need a second cycle to dry
- The dryer top or the laundry room feels unusually hot
- Lint collects around the outdoor hood, or its flap barely opens
- Clothes come out hot but damp
- A burning smell during a cycle; stop the dryer and have it checked
Not sure it's the vent? The slow dryer guide covers load, heat and lint causes too.
Lint Screen, Vent Line, Outdoor Hood: Who Cleans What
Your Jobs
- Clean the lint screen before or after every load
- Never run the dryer without the lint screen
- Clear lint from the outdoor hood and check that the flap opens
- Keep the hose behind the dryer from crushing against the wall
A Technician's Jobs
- Brushing and vacuuming the full vent line
- Clearing elbows, long runs and roof terminations
- Checking for crushed, disconnected or noncompliant duct
- Measuring airflow at the outdoor hood after cleaning
Townhomes with long or roof-mounted vents have their own challenges; see townhome and HOA dryer vents.
What Virginia Code Expects From a Dryer Vent
| Part | Requirement |
|---|---|
| Exhaust duct | 4-inch smooth-wall metal |
| Length | 35 feet maximum, reduced for each elbow and fitting |
| Transition duct behind the dryer | 8 feet maximum, listed to UL 2158A, never concealed |
| Outdoor termination | Backdraft damper; no screen; at least 3 feet from openings into the building |
A vent that misses these points needs dryer vent repair, not just cleaning.
What Homeowners Around Dulles Pay
| Job | Typical range |
|---|---|
| Standard single-family vent | $135–$200 |
| Full range reported in Fairfax and Loudoun | $135–$360 |
Long runs, roof terminations and repairs raise the price.