What Sizes Are Available for Dryer Vent Pipes?


Quick Answer

Dryer vent pipes are available in various sizes with 4 inches, 4.375 inches and 4.5 inches being the most common sizes. All ducting for a dryer must be at least 4 inches in diameter, and the exit hole in the exterior wall is typically 4.25 inches wide.

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Full Answer

Dryer vent piping should not exceed 25 to 35 feet in length, depending on the material used. For piping that includes a 90-degree bend, 5 feet should be deducted from the total. Dryer venting should not be connected to any other exhaust venting, and it should have a hood or roof cap equipped at the exterior of the home.

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