The Bosch VAC090AH 9-Gallon 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 delivers a maximum 150-cubic-feet-of-air-per-minute rate (CFM), with a sustainable 97 In. static water lift (maximum). The automatic on-board filter-cleaning system activates every 15 seconds to help maintain maximum suction power.