How often should a dryer vent be cleaned?

There is no single federal interval, so the honest answer is a routine plus triggers. Clean the lint screen on every load, have the vent and exhaust duct cleaned periodically, and do not wait for the calendar if drying slows down. One major manufacturer sets the figure at once a year, and that is a sensible default for most households.

What the official guidance says

The Consumer Product Safety Commission tells owners to clean the dryer vent and exhaust duct periodically, and to check the outside dryer vent while the dryer is operating to make sure exhaust air is escaping.^[1] It does not give a number of months. It also says lint can block the flow of air, cause excessive heat build-up, and result in a fire in some dryers.^[1]

The U.S. Fire Administration is just as direct about the risk: you are at higher risk of a clothes dryer fire if you do not clean your lint filter and dryer vents.^[2] It lists the back of the dryer, where lint can build up, as a place to clean, and says to check the venting system behind the dryer to make sure it is not damaged, crushed or restricted.^[2]

For a number, look at your dryer's own manual. GE's owner's manual says to inspect and clean the exhaust ducting at least once a year to prevent clogging, and that the interior of the machine and the exhaust duct connection inside the dryer should be cleaned at least once a year by a qualified technician.^[4] A yearly visit is a practical way to have both done together. Other makers may state something different, so check the manual for your model.

A simple schedule

• Every load: clean the lint filter. The U.S. Fire Administration says to clean it before and after each cycle and never to run the dryer without one.^[2]
• Monthly: scrub the filter if you use dryer sheets. ENERGY STAR says they can leave a film on the filter that reduces air flow, and it suggests scrubbing it with a toothbrush once a month.^[3]
• Once a year: have a professional clean the duct and the dryer's interior, or whatever interval your manual states.
• Any time: check the outdoor hood while the dryer runs. If the flap does not open, treat it as a problem now.

When to clean sooner

Your own household may justify a shorter interval than a year. The signs are the ones that mean airflow is falling:

• Clothing is still damp at the end of a typical drying cycle, or drying takes longer than normal. The Consumer Product Safety Commission says either may be a sign that the lint screen or the exhaust duct is blocked.^[1] See why a dryer takes so long to dry clothes.
• Little or no air at the outdoor hood while the dryer runs.
• A dryer that feels hotter than usual on the outside, or a laundry room that smells of hot lint.
• Foil or plastic accordion duct, or a duct run with many bends. The Consumer Product Safety Commission says the flexible plastic or foil type can more easily trap lint and is more susceptible to kinks or crushing.^[1]

A big household that runs the dryer daily puts more lint through the duct than a single person who does a few loads a week, so the first group should not stretch the interval. These are judgment calls rather than published rules, so when in doubt, have the airflow checked.

What to book

Ask the cleaner to clear the full run and confirm air leaves the house, and say whether you want the dryer's interior included. What a dryer vent cleaning includes explains the usual scope, how much dryer vent cleaning costs in Virginia covers pricing, and is professional dryer vent cleaning worth it helps you decide.

When to call a licensed pro

A routine cleaning calls for a careful, insured cleaner. Bring in a licensed professional when the job grows: a new vent through a wall or roof, replacing a long duct run, or any gas-dryer connection. GE's manual says gas dryers must be exhausted to the outside, and warns that plastic or other combustible ductwork can cause a fire.^[4]

If the work is valued at $1,000 or more, a valid Virginia Contractor's License is required for the license category in which the contractor is to work.^[5] The Board for Contractors also warns that unlicensed contracting is against the law.^[5] Check any licence before you pay, using how to check whether a contractor is licensed in Virginia.

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