The Bosch VAC series dust extractors come with the best in class combination of air flow and suction power, which makes this unit ideal for dust extraction. The VAC140A is capable of wet and dry pick up. When paired with a HEPA filter (accessory VF120H - not included), this unit has been independently tested to meet the EPA definition of a HEPA vacuum. The automatic filter cleaning system cleans the filter every 15 seconds, ensuring the dust extractor is always working at maximum efficiency. . Power tool activation reduces the need for a second extension cord, the tool can be plugged directly into the dust extractor. Heavy duty wheels, a locking castor, a metal frame, and L-BOXX compatibility make this more than just a typical dust extraction unit.