What Size Should a Dryer Vent Be? (Explained)
A dryer vent pipe should always be 4 inches in diameter and have a vent cap of the same size. A dryer vent 4 inches in diameter or equivalent interior surface area meets requirements for all dryers Anything smaller than 4 inches could cause clogging issues with the lint and will also overwork your dryer, significantly shortening its lifespan.