Electrical Enclosure Filter - 135 CFM. Prevents dust, corrosive fumes and heat from damaging sensitive equipment like contactors, controls and servers. 1-speed unit that can operate continuously. The unit is fitted with a 2-ply pre-filter and high efficiency pleated cartridge. It operates off 120V/1/60 (3.0 Amps) and will effectively pressurize enclosures as large as 20 cubic feet. The typical motor life is 50,000 hours.