Our Forward curved centrifugal fans be used in communication equipment, air supply equipment. Item NO.Voltage(V)HZ.CURR.(A)POWER(W)SPEED(R/min)Capacitor(µF)NET WEIGHT(KG)NOISE(dBA)Max airflow(m/h)YWF-F4S-200B230500.52116128043.5531350YWF-F4T-200B380500.261091300/3.5531380