The MBH1i series by Certolux is a recessed luminaire with plenum access that provides access above the ceiling, through the fixture. The fixture is ligature resistant and resists intentional abuse. It comes standard with tamper resistant hardware and durable polycarbonate lensing. The architectural diffuser provides a durable yet non-clinical appearance. The one-piece inset door seals directly to the housing. The mounting is for flanged installations drywall or security ceilings. Most models are found in the Guide and accepted for use in high risk areas. Not for use with T-bar grid ceilings.