The PMFA120 is a Fan Filter Assembly with 3-parts, an outer cover, an inner fixing plate and a filter pad. The grill cover is moulded in polycarbonate with matt finish. It incorporates quick release fasteners to assist easy changing of the filter pad. The inner fixing plate is constructed of steel sheet with a matt black epoxy powder finish. A welded wire screen provides protection when the filter pad is changed with the fan still running.