POPULA FEM series Double Direction Energy Recovery Ventilator Product Feature: Energy Recovery Cartridge:Special cellu lose-based polymer selective permeability membrane with excellent heat transfer and permeability to improve energy recovery efficiency. Casing : Modular design,easy to maintain and assemble or disassemble.Ensure the casing is strongand stable. Performance : Multi-wings impeller design;high efficiency smooth double suction worm gear ducts to ensure the high efficiency and pressure.Along with sound-absorbing and noise-reducing materials to provide low noise,high air volume,continually long-time stable operation. Control : LCD control as standard,three level of speed adjustment. Purifying : Component of primary , middle , and high efficient filter as well as activated carbon filtration systems , high efficiently purified , odour removed. PRODUCTS INFO Brand:POPULA Electric Current:AC Power:120-190w Voltage:220V Frequency: 50HZ Air Volume:150-500M3/h Air Pressure:200-240 Pa Speed:960r/min ,1450r/min,2960r/min Max Noise: