SW900 by Advance 41 inches of sweeping in a self propelled walk behind floor sweeperThe Advance SW900 walk-behind sweeper for both indoor and outdoor use offers effective dust-free removal of dry debris. The large main broom combined with dual side brooms will enhance your everyday productivity and cleaning results. The main broom chamber is shrouded with rubber skirting to eliminate dust from escaping the main broom chamber. A vacuum fan is used to clear the chamber and pull dust from the main broom into the hopper assembly. A panel filter is used to filter the air for dust free sweeping. The dust control filter has 21 cubic feet of filter material and can capture dust from 5-10 microns. If your dust filter gets blocked, it can easily be cleaned by using the manual filter shaker mechanism. The SW900 offers a large 2.1 cubic foot hopper that is easily removed for dumping. The on board charger allows you to plug in to any 110v outlet and the algorithm in this solid state charger will make sure that your batteries are charged properly. The SW900 is an ideal sweeper for cleaning contractors, industry and manufacturing, schools, warehouses, exhibitions, and entertainment facilities.