HZ900 Hazardous Dust Vacuum Cleaner H Class (HZ900) - NumaticHZ900 Hazardous Dust Vacuum Cleaner Numatic H Class Industrial HEPA Filter Vacuum (HZQ900) The Numatic HZ900 (previously known as the HZQ900) is a large capacity H Class industrial vacuum cleaner designed for safe collection of hazardous dust, including asbestos, silica, and toxic particulates. Built for demanding environments such as construction sites, workshops, and remediation facilities, it combines superior HEPA H13 filtration, massive capacity,