A 600 is one of the most advanced portable air cleaners available on the market. It is tested and certified for use as both an air cleaners and a negative air machine. Thanks to a reliable filter system and a design that is perfectly matched to operation with HEPA class H13 filters, that are tested and certified at an efficiency rate of 99.99% at 0.3 microns, the air cleaner puts out superior air quality – be it when dealing with concrete dust, fine sanding dust or gypsum dust. It has two warning lights to indicate when the filters are clogged or leaking. A 600 is a quiet-operating air scrubber with a sturdy, compact cabinet. Airflow can be set at two different speeds. The airflow is directed upwards to avoid disturbing dust on surfaces. Sale limited to the next 264 units Shipping from KS location (2023-11-10) Note discontinued color gets you 50% off prices. Unit can ship in red, black, orange, factory choice. All Sales Final. Compare to current or past OEM associations: A600 A 600 967664401 HUS07-967664401 967 66 44-01 967818101