The VAC140AH 14 gal Dust Extractor with Auto Filter Clean and HEPA Filter provides a complete package that is designed to help users move toward compliance with the OSHA silica dust regulation. The dust extractor also has power tool activation that allows the tool to activate the vac and a Power Broker dial to match the suction force to application. The dust extractor delivers a maximum 150 cubic feet of air per minute rate (CFM), with a sustainable 97" static water lift (maximum). The automatic on-board filter cleaning system activates every 15 seconds to help maintain maximum suction power.