... great air volume 3) steady long-lasting circulation 4) low noise ZR series push-pull centrifugal fanFrame, frames are made of ... aluminum alloy frame motor, 380V, 1.5KW, 50Hz, 3-phase, 4-pole speed, 1410r/m, IP55, class F, efficiency 90%, ... )50≥140035000750≤643801000x1000x450175USDZRP-13801270(50in)50≥1400480001500≤643801380x1380x450235USD ZR series wall-mounted push-pull centrifugal ventilating fan