In the Roxwell Oxsano tunnel fan, performance starts with the aerodynamic design and a uniquely shaped fan blade. This tunnel fan is among the most powerful on the market with an airflow of 30 300 CFM* and an efficiency ratio of 20 CFM/watt*. The Oxsano fan is therefore registered as a 55 inch fan with a high capacity. Variable speed is made possible by the speed controller in the motor. The fan then runs according to the actual need and the energy consumption decreases. The transition between ventilation levels is also seamless, which is good for the well-being of the animals in the house. In addition, a direct drive is the most efficient method of running a motor.