b'WHEN YOU STEP OUT OF YOUR SHOWER OR BATH, AND YOU FEEL THE TEMPERATE AIR COMING FROM YOUR VENT, DO YOU KNOW WHAT ELSE IS COMING OUT?If the ductwork has dust and debris that is mixed with damp air, mold can grow.OTHER HOMES MAY HAVE BATHROOM WALLS CONSTRUCTED WITH BASIC PAPER-FACED DRYWALL. When drywall gets wet in baths and other rooms prone to warm dampness, the moist paper can be a perfect breeding ground for mold.'