The MCAS (Multiple Chamber Air Sterilization) units are designed to remove or kill all nuclear, biological, and chemical agents. All MCAS units include a HEPA filter, Activated Carbon Filter, TEDA Carbon filter, and Ultraviolet Radiation sterilization, and AC or DC air blower. The MCAS 120 and MCAS 600 use the same stainless steel filter housing and filters but different high pressure air blowers. Spare HEPA filter trays and carbon trays are included. A clear cabinet cover allows visual inspection of the HEPA filter trays.