AF400 Air Purifier (for airborne dust) For Dust Producing Lab Areas up to 120 ft² By QuatroAF400 Air Purifier (for airborne dust) For Dust Producing Lab Areas up to 120 ft Contains long lasting industrial grade filters for elevated dust levels Item #: AF400P D Provides protection for spaces up to 120 ft 3 stage air filtration system designed to efficiently reduce airborne particles Affordable low maintenance general purpose air purifier for single rooms Powerful, compact and very portable Brushless motor designed for continuous duty True