The Exair Heavy Duty HEPA Vac is designed to move more material with less wear. The 30-gal industrial vacuum cleaner features a smaller volume drum to fit in tighter spaces and is suited for less frequent or lower volume applications. It is engineered to filter contaminants to HEPA requirements in dusty environments requiring frequent cleaning. All filters are tested for minimum 99.97 percent filtration at the 0.3 micron level to meet HEPA standards in strict accordance to IEST-RP-CC-007.