The Daisho twin box fan is available in a range of sizes from 125mm to 630mm diameter connection spigots and cover duties up to 3.5 cubic meters per second flow rate and 1250 pascals pressure. All units are fitted with high efficiency EC motors which run via a 230V single phase 50Hz feed, the motor drives a backward curved centrifugal impeller which is made from glass fibre reinforced plastic. The motors are controlled by Woods own iFan controller with integrated speed controller and most importantly an auto changeover switch. In the unlikely event of one of the fans failing, the auto changeover switch detects that a fan has failed and automatically switches on the second blower. The casing of the Twin box fan is made from folded pre-galvanized steel and is lined with acoustic medium. The unit is suitable for mounting in the horizontal orientation using the integrated mounting brackets, if vertical configuration is required please contact us.