The CRF is designed to meet the toughest requirements in clean room and BSL applications. The enclosed and gasketed housing and one-piece door protect against infiltration of airborne bacteria. Die-formed edges on door frame and the hole-free design of housing prevent air exchange between fixture and plenum to allow re-lamping without contaminating the area. One-piece gaskets are included on lens and on door edge for easy replacement. The CRG can work in 9/16-inch, 1-inch and 1-1/2-inch T-Grid ceilings. It is UL/cUL listed for wet locations and IP 65 rated and manufactured in accordance with ISO 14644, NSF and Federal Standard 209E in a certified ISO 9001:2000 facility.