THE BASIC PRINCIPLES OF DRYER VENT INSTALLATION

When the dryer operates, the cup lifts, permitting scorching air and lint to escape. If the dryer shuts off, the cup falls back again into place, creating a tight seal above the opening.: To make the dryer venting practically invisible, go with a rigid steel duct. However, if you're not ready to break in to the wall, the second best choice is to se