How Often Should You Clean Your Dryer Vent?

How Often Should You Clean Your Dryer Vent?

Updated July 2026

Quick answer

For most homes, the dryer exhaust vent should be inspected and cleaned at least once every 12 months. A six-month schedule is a sensible precaution for households that use the dryer heavily, have pets, dry a great deal of towels or bedding, or have a long vent with several bends. Do not wait for the next scheduled cleaning if the dryer is already showing signs of restricted airflow.

Cleaning the lint screen after every load is essential, but it does not replace cleaning the full exhaust duct from the back of the dryer to the exterior outlet.

Why annual dryer vent cleaning is a strong baseline

A vented clothes dryer needs a clear path to move warm, moisture-laden air outdoors. Although the lint screen captures much of the lint released by clothing, some lint can pass into the exhaust system. As it accumulates, airflow may become restricted and the dryer may need to run longer and hotter.

The National Fire Protection Association (NFPA) advises cleaning lint from the vent pipe once a year—or more often when clothes take longer than normal to dry. It also identifies failure to clean as the leading cause of home clothes-dryer fires. LG Canada likewise recommends annual vent and duct cleaning, while GE Appliances advises cleaning the vent at least once a year. Some manufacturers allow a longer interval under favorable conditions, so the appliance manual should always be checked; however, an annual schedule is a practical, safety-conscious rule for most households.

Regular cleaning can help:

maintain proper airflow;

reduce unnecessary drying time and energy use;

limit heat stress on the dryer and clothing;

identify crushed, disconnected, damaged or poorly routed ductwork; and

reduce the fire risk associated with lint accumulation.

No maintenance schedule can eliminate every risk, but keeping the lint screen, duct and exterior outlet clear is an important part of dryer safety.

When should a dryer vent be cleaned every six months?

Not every dryer produces and moves lint at the same rate. Consider having the system checked approximately every six months when one or more of the following applies:

The dryer runs daily or handles several loads on many days.

A large family shares the dryer.

The home has shedding pets.

Towels, blankets, bedding, work clothes or other lint-producing items are dried frequently.

The exhaust duct is unusually long or contains several elbows.

The dryer is stacked, enclosed or located far from the exterior wall.

The exterior outlet is on the roof or another location that is difficult to monitor.

The machine serves a shared laundry room, rental property, salon, spa or other high-use setting.

The system has a history of airflow restrictions.

Six months is not a universal legal requirement. It is a prudent maintenance interval for higher-use or more complex systems. The condition of the vent and the dryer manufacturer’s instructions should guide the final schedule.

Warning signs that the vent may need attention now

The calendar is only a starting point. Arrange an inspection or cleaning sooner if you notice:

clothes taking longer than usual to dry;

a load requiring a second cycle when it previously dried in one;

the dryer, laundry or laundry room becoming unusually hot;

a burning, scorched or musty smell;

lint collecting behind the dryer or around the exterior outlet;

weak airflow at the outside vent while the dryer is operating;

the exterior flap failing to open fully;

a “check vent,” airflow or similar warning on the dryer; or

the dryer stopping unexpectedly because it is overheating.

If you smell burning, see smoke or observe extreme heat, stop using the dryer. If it is safe to do so, turn it off and disconnect the power, then seek qualified help. Call emergency services if there is any indication of fire.

The lint screen and dryer vent are not the same thing

Two maintenance routines are often confused:

Lint-screen cleaning: Remove lint from the screen before or after every load, following the appliance manufacturer’s instructions. A screen coated with residue from dryer sheets or fabric softener may also need periodic washing.

Dryer-vent cleaning: Clean and inspect the complete exhaust path, including the connector behind the dryer, the duct through the wall or ceiling, the elbows and the exterior termination. The outside flap should move freely, and the connector should not be crushed or kinked.

Cleaning only the short hose behind the dryer—or vacuuming only the visible lint at the outside cover—may leave material elsewhere in the run. Long ducts, roof exits, multiple bends and inaccessible sections are often better handled with professional equipment.

What about condos, strata properties and rental homes in B.C.?

Dryer ducts in multi-unit buildings can be longer and more complicated than those in many detached houses. They may travel through ceilings or walls and terminate several storeys above ground or on the roof. Access, responsibility and approved service procedures can also depend on the strata plan or building rules.

Before arranging service in a condo, confirm whether the duct is part of the strata’s maintenance program and whether the building requires an approved contractor. Renters should contact their landlord or property manager rather than opening concealed ductwork themselves. B.C.’s Residential Tenancy Branch policy guideline states that a landlord is required to clean the dryer exhaust pipe and outside vent at reasonable intervals.

Does this advice apply to every type of dryer?

This article concerns vented electric and gas dryers that exhaust air outdoors. Ventless heat-pump and condenser dryers do not use the same exterior exhaust duct, but they still require model-specific maintenance of filters, heat exchangers, condensers or water systems. Follow the owner’s manual for the exact appliance.

Gas dryers also require qualified inspection and servicing of the gas connection. Dryer-vent cleaning should not be treated as a substitute for appliance or gas-system repair.

A simple dryer-maintenance schedule

Every load: Clean the lint screen.

Regularly: Look for lint around the dryer and check that the exterior flap opens and airflow appears strong.

Every 12 months: Have the full dryer exhaust system inspected and cleaned for a typical household.

About every six months: Consider inspection and cleaning for high-use homes or complex vent systems.

Immediately: Stop and investigate whenever drying time, heat, smell, airflow or the dryer’s warning indicators change.

The bottom line

For most Lower Mainland homes, remembering one simple rule is a good start: clean the full dryer vent at least once a year and sooner when use or warning signs justify it. Pair that annual service with lint-screen cleaning after every load.

Sal’s Exterior & Interior Cleaning provides professional dryer vent cleaning for homes and appropriate multi-unit properties across the Lower Mainland. If you are unsure when your vent was last cleaned—or your dryer is taking longer than it used to—contact us to discuss the system and arrange an assessment.

Meta description: Learn how often to clean a dryer vent, when six-month cleaning may be wise, and which warning signs Lower Mainland homeowners should not ignore.

Research sources

National Fire Protection Association, Clothes Dryer Safety: https://www.nfpa.org/downloadable-resources/safety-tip-sheets/clothes-dryer-safety-tip-sheet

LG Canada Support, Flow Sense Warning—d80/d90/d95: https://www.lg.com/ca_en/support/product-support/troubleshoot/help-library/cs-CT20098071-1417122570588/

GE Appliances, Dryer Maintenance Tips: https://repair.geappliances.com/resources/faq/article/dryer-maintenance-tips

Maytag Product Help, How to Check Venting: https://producthelp.maytag.com/Laundry/Dryers/Product_Info/Dryer_Product_Assistance/How_to_Check_Venting

Province of British Columbia, Residential Tenancy Policy Guideline 1: https://www2.gov.bc.ca/assets/gov/housing-and-tenancy/residential-tenancies/policy-guidelines/gl01.pdf

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