Designed for the toughest air cleaning jobs, the high capacity F115 surface-mounted air cleaner uses four filters to help clean indoor air. It works great in laboratories, locker rooms, casinos, nursing home common areas and other larger spaces. It attaches to any type of ceiling and needs little overhead clearance, thanks to a compact case that extends only nine and three-fourths inches into the room. The attractive cover snaps off for quick access to the prefilters, media filters, and sorbent media. It's also relatively quiet.