These enclosures use exhaust HEPA filters to provide user and environmental protection, but no product protection. UV lamps provide secondary decontamination.

Purifier Class I Enclosures protect the user from agents that require Biosafety Level 1, 2 or 3 containment but no product protection. Exclusive features include: ergonomic air foil with aerodynamic Clean-Sweep airflow openings; upper dilution air supply; zone-perforated rear baffle; side-entry air foils; and upper containment sash foil. Other features include: nominal inflow velocity of 75 to 105 fpm; 99.99% efficient exhaust HEPA filter; variable speed built-in blower with vibration-isolated impeller and solid state control rated for 2 amps; intrinsically-safe, negative pressure design; Minihelic pressure gauge; low discharge volume and quiet operation; powder-coated aluminum and steel construction; fluorescent and 254 nm UV lamps; UV protection panel interlocked with UV lamp; blower switch and 3-way light switch: UV, off and fluorescent; 1/4″ thick tempered safety glass front sash and sides; 9.44″ high sash opening; ergonomic 10° angled and hinged sash that pivots upward, locks to a loading height of 20″ and has side wiping seals to contain contaminants; two utility ports; particulate containment tested; and one-year warranty on parts and service.