Patent ID: 6123617
Filing Date: 2000-09-26
Classification: F24F

Abstract:
An air filtering system for use with a clean room, comprising:a primary air mover that supplies make-up air and recirculation air to the clean room, the primary air mover being located outside of a ceiling space of the clean room;a make-up air mover that supplies the make-up air to the primary air mover;one or a series of make-up air filters that filter the make-up air prior to the make-up air being supplied to the primary air mover;a recirculation air path that supplies the recirculation air from the clean room to the primary air mover; andat least one chemical filter that filters the make-up air and the recirculation air prior to the make-up air and the recirculation air being supplied to the clean room, wherein all the recirculation air and all the make-up air is filtered by the at least one chemical filter and is supplied to the clean room by the primary air mover.