AIRFOIL FAN/MULTIVANE FAN For Clean air, Fumes & Moisture Application:- FAN-TECH Double & Single width fans provide the highest efficiency, lower power & sound level so used in air-handling unit & evaporates from the Powder, Granular & Other. FAN-TECHfans of are rugged welded construction with over-sized shaft & bearing to assure long life. Inlet vanes are ideal for variable air volume systems.