Light-weight, dent and corrosion resistant portable mini air scrubberVariable speed control3 stage filtration with a 99.97% @ 0.3 micron HEPA filterFilter monitoring gaugeHour meter12" intake and exhaust hose flangesThis unit is stackable and has the daisy chain capability to operate 4 units on one power cordETL certified to conform to UL & CAN/CSA safety & flammability standardsMeets UL94HB flammability requirements for polymer cabinets housing energized electrical components

