Be sure your HEPA Wet/Dry Vacuum is certified! A lot of companies claim to have a HEPA vacuum, but many are not certified. If an EPA/WorkSafe inspector walks onto your job site, and your HEPA vacuum does not meet the standards, they can shut you down or slap you with a fine up to $32,500. The HEPA Wet/Dry Vacuum is certified and ideal for renovation contractors who have to comply with EPA regulations covering lead paint removal. concrete grinding and cutting. The EPA specifies the use of a carpet head with a beater bar so be sure to order the optional HEPA Head carpet head. Its beater bar is powered by the airflow of the vacuum. The Dustless HEPA Wet/Dry Vacuum gives you a distinct advantage by enabling you to switch from dry to wet operation without worrying about getting the valuable HEPA filter wet. A protective baffle/wall inside the canister protects the HEPA filter from water.