Nailor 92FF Series Fan Filter Diffusers consist of a unitary, welded stainless steel plenum, a removable perforated grille face, pressure independent EC motor and forward curved centrifugal blower. The fan/motor assembly is designed to supply HEPA/ULPA filtered air to a clean room environment and can be used in many applications such as microelectronics, pharmaceutical, biotechnology as well as aerospace manufacturing/assembly and laser/optics industries. Each unit is built to IEST RP Standards and factory leak tested and serialized (HEPA filter only) with a PAO aerosol. Available in stainless steel or aluminum construction.