Webhow to seal a dryer vent pipe:

Webthis 4 dryer vent seal has a floating shuttle that stays closed unless there is a load of clothing drying.

Webwhen the clothes dryer or bath fan operates, the exhaust air pressure pushes the damper to let the exhaust air escape from the vent.

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Medium to large gaps.

A positive seal keeps cold or hot air out as well as unwanted pests.

For filling larger vent gaps, foam is the best choice.

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