Options for using the new DustRight™ 1200 Air Filtration System from Rockler include setting it to run in a continuous cycle, or using a built-in timer to run for two-, four-, six- or eight-hour intervals. It will filter up to 1,185 cubic feet per minute, which completely cycles the air in a 20′ x 20′ room in under three minutes. The all-steel construction DustRight 1200 can be hung from the ceiling joists to save space and operates with a standard remote control. The three-speed 1/3-hp motor powers a system that removes up to 98 percent of five micron particulate and up to 85 percent of one micron particulate. It runs on 110-volt service, has tool-free filter changes, and sold for $329.99 in 2011.