... 3) steady long-lasting circulation 4) low noise ZR series push-pull centrifugal fanFrame, frames are made of galvanized ... /m, IP55, class F, efficiency 90%, top/foot mounted, certification, CCC.(motor can be supplied as demand)Motor bearing ... ≥140035000750≤643801000x1000x450175USDZRP-13801270(50in)50≥1400480001500≤643801380x1380x450235USD ZR series wall-mounted push-pull centrifugal ventilating fan