Tanis Technologies' Module-Air AF-1000 Series Air Filtration products reportedly have several major advantages over other commercial/industrial air cleaners, according to the company. 

The self contained AF-1000 units provide versatility by offering a 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 be 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.  Most importantly, the AF-1000 Series is built completely in America with American components.