The Nilfisk ALTO Aero 31 is a robust and versatile wet/dry vacuum ideal for workers in automotive and construction industries. This powerful yet easily-maneuverable model offers an 8-gallon collection capacity, 127 maximum CFM, and Nilfisk's Push & Clean filter cleaning system. Quickly clean indoor and outdoor spaces and enjoy multiple upgraded features that make any mess an easy fix. This HEPA-certified model catches even the smallest particles (99.97% of particles down to .3 microns). It complies with EPA RRP, OSHA, and DoD standards.