... , 1410r/m, IP55, class F, efficiency 90%, top/foot mounted, certification, CCC.(motor can be supplied as demand)Motor bearing, national ... -type belt, imported from Korea. Shutters, galvanized board, 0.8 mm thickness while the middle piece thickness 1.0mm. Galvanizing layer ... test, They assure the quality of the fan. exhaust fan with CE certification