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How Often Should a Dryer Vent Be Cleaned?

Once a year for a typical household. Every six months if you have pets, a larger family, or a long vent run. Here's how to figure out which bucket you're in.

The short answer

For most single-family homes in North Jersey, once a year is the right cadence. That matches the recommendation from the National Fire Protection Association and from every major dryer manufacturer's owner's manual.

For higher-load households, every six months is more appropriate. You're a higher-load household if any of these apply:

  • Family of four or more.
  • Pets that shed — especially dogs and long-haired cats.
  • Vent run longer than 25 equivalent feet (which is most older Montclair, Maplewood and Bloomfield homes with basement laundries).
  • Multiple elbows, a roof termination, or any flexible foil ducting in the run.
  • You run more than one full load most days.

If your vent has never been cleaned

Schedule it now. Lint accumulation isn't linear — it gets worse as the run narrows, because reduced airflow means lint that used to make it out of the vent now sticks. A vent that's been ignored for five or six years is significantly more dangerous than one that's two years overdue, and a routine cleaning may not be enough to fully restore airflow if collapsed flex duct or rodent damage has set in. Either way, the first step is a cleaning and an honest read on whether the line itself is salvageable.

Apartment buildings, condos and HOAs

Multi-family buildings should plan on annual cleaning of all common-element vent risers at minimum. Buildings with shared exhaust risers serving stacked closet laundries, or with high tenant turnover, should plan on every six months. New Jersey fire code requirements and many insurance carrier requirements increasingly assume documented annual maintenance — see our commercial service page or one of our city pages: Newark, East Orange, Bloomfield.

Why the answer matters

The U.S. Fire Administration attributes about 2,900 home fires every year to clothes dryers, with failure to clean the vent line as the leading cause. The cost difference between annual and every-six-months service is small. The cost difference between either cadence and a missed cleaning that turns into a fire is enormous — and that's before you count the energy waste from running a clogged dryer for an extra cycle every load. See our fire safety article for the full picture.

Rule of thumb: if you can't remember the last time the vent was serviced, it's overdue. Schedule it now and reset the clock.

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