Module-Air AF-1000 Series Air Filtration units provide versatility by offering variety of ‘bolt on’ intake options which include multi-directional Angled Intakes, standard Straight Intakes, Hood Pans, and Curtain Enclosures, all of which offer standard two stage filtration, as well as optional spark arrestors and/or carbon filter upgrades. All intake options hold standard filter sizes. The standard filter sizes ensure that replacement filters will inexpensive and readily available. All AF-1000 units come standard with a built in silencer that brings the sound level down as low as 62dB.