Formally called Air Force Fans, the Can ISO-Max are German engineering at its best and the ultimate product for quiet and powerful ventilation. It uses the stator-rotor system that enables it to be efficient in air performance and power consumption wise.  They are robust, lightweight and extremely powerful fans, built into a silencer housing to provide amazing levels of noise reduction. On top of this a special type of foam is also added to aid in noise reduction. It's low weight, strong air performance and quietness make it the most advanced choice. Perfect for larger growers who require big fans but not the large amounts of noise they produce.