ANSI/NSF 49(i7)-2004
Class II (laminar flow) Biosafety Cabinetry

Standard No.

ANSI/NSF 49(i7)-2004

Release Date

2004

Published By

American National Standards Institute （ANSI)

Scope

To revise 3.11to indicate that modern technologies have been shown to be at least equivalent to the 1950s technology in regards to HEPA filters.