BE Pressure Washer Surface Cleaner for driveways, patios, pool decks, sidewalks and any flat surface. The BE Whirl-A-Way is the model I have used to clean my garage floor since the deck eliminates the overspray issue of a traditional wand. It has a 20″ Deck that is very lightweight. This is called a TRUE 20″. An average 20″ Surface cleaner has a spray bar measuring roughly 18 inches. The Whirl-A-Way 20 inch has a 19.5″ spray bar covering the full width of the deck. We have used these for cleaning tile roofs for years. It allows us to remove mildew efficiently without using chlorine or other harsh chemicals.