How Often a Dryer Vent Needs Cleaning
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Once a year is the baseline for an average household. The real driver is not the calendar, it is how many loads run and how long the vent is.
| Situation | Interval | Why |
|---|---|---|
| 1 to 2 people | Every 12 to 18 months | Low load count |
| Family of four | Every 12 months | The standard case |
| Large household | Every 6 to 9 months | High load count |
| Vent run over 25 feet | Every 6 to 9 months | More surface for lint to catch |
| Rooftop termination | Every 6 to 12 months | Vertical runs trap more |
| Pets in the house | Every 9 to 12 months | Hair adds to lint load |
Where this comes from
- Clothes dryer fire safety — National Fire Protection Association
- Chimney inspection levels — Chimney Safety Institute of America