The Fail-Safe CFG Series is designed for use in horizontal or non-laminar air flow clean rooms. The enclosed and gasketed housing and one-piece, outside door frame protect against infiltration of particles and airborne bacteria. The housing and door are designed to work with standard 1" and 1-1/2" T-grid ceilings and most 2" T-grid ceilings. Door frames feature a gasket design which eliminates ledge or crevice exposure preventing the harboring of contaminants. The CFG Series' sealed, hole-free housing prevents air exchange between the fixture and plenum and allows relamping without contamination of clean areas. These luminaires are U.L. listed and C.S.A. certified for wet locations.