-EL saves energy; -fan engines are manufactured in Switzerland; -fans are assembled in Germany; -small sizes; -high-pressure available; -direct connection to circular duct; -fan motor protected within the rotor space; Fan efficiency is 50% higher. The energy demand is decreased by 30%. The environment is protected. Required budget value is reduced. In addition, control and adjustment equipment with smaller size can be chosen. High power density of EL cause compact dimensions-fan housing is exactly appropriate to diameter connection. It requires no additional space for installation.   EL saves money. About 70% to 90% of the total costs of a fan are due to the energy costs. These are reduced by 30% using EL. The complex borders system of the fan blades. The unusual power data, especially the unique high performance are due to a complex borders system of the fan blades, and also to a median channel, resulting in substantial energy savings. The fan motor does not have a negative influence on the airflow and is protected by the rotor. The fan motor is completely separated from the airflow when comes to some fan models. It also includes mounting brackets. A mounting support is attached to the fan housing.

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