The Jet 3-speed air filtration systems clean and circulate the air in your shop while you work, filtering 98-99 of all particles, five microns in size and 85 of particles one micron in size. And with the timer, you come into your shop, set the timer for two, four or eight hours and forget it. The system automatically shuts down at the time youve set. They use a convenient standard size outer filter, run quietly and come with a remote control for convenience.Grabs 98 of anything from 5 microns up in size and 89 of single micron size particles. Prefilter is 5 micron. Inner filter is 1 micron. Outer filter is a disposable electrostatic filter with a paper frame. Units are designed to be set on a workbench or hung from the ceiling, either tight against the ceiling or hanging from chains. Eyebolts are in place for hanging the unit. The three pocket filter fits inside, and can be blown out. Filters are easily replaced, without tools. The powder coated metal box is heavy duty. Fan and motor are also constructed for durability. Two easy grip handles inset on both sides for ease of handling. Quiet running so it can be left on during work. Model AFS-1000B is 1044 CFM and has 3 speed: 550, 702 and 1044 CFM. The AFS-1000B can filter the air in a 20 x 20 x 8 shop in under five minutes, and filter the air in that size shop a dozen times an hour. Includes a paper filter.