This fan with dual ball bearings is the newest addition to the Slip Stream Serie which is called one of the the least noisy yet powerful fan series on the market. The double ball bearing technology is designed for continuous operation. It reduces friction and thus wear. Moreover, it is less sensitive to dust, which enables an up to 10 times longer lifespan compared to fans with conventional bearings. The principle of small hub and large rotor blades was maintained, which leads to a 20 -40% higher airflow compared to fans with a traditional hub. The five different speed versions provide a wide range of applications and guarantee excellent performance at optimum operating temperatures at all times.