All stainless steel construction (except cart). An optional true HEPA (H14) Filter is available. This unit is also equipped with a maintenance free, beltless side chanel blower with a 25000+ hour lifespan. The single or 3-phase motor is fully enclosed in a protective cabinet. This unit is designed for general maintenance. This unit is equipped with a Manual Filter Shaker (MFS) system. This unit can be equipped with an optional poly liner and clip for the easy and safe disposal of recovered materials.