What's a Dryer Vent? A dryer vent could be the tube that will take the dampness that may be removed from your apparel and linens during the dryer and operates the moisture from the dryer outside the house.Link the Offset Duct on the Dryer Put a 4 one/2-inch stainless steel band worm-gear hose clamp over the dryer's discharge vent. Move the dryer in