Small fan with ball bearings. Plastic housing protected against water jets (IP 45) with grille cover. The upward-facing slats completely prevent the view into the intake opening and the built-in guide vane. Plug-in claw fastening for tool-free installation in pipes with a nominal width of 100 mm. Contact protection in accordance with DIN EN 294. Impeller with 5 profiled blades made of plastic, high efficiency. AC shaded pole motor with thermal overload protection for continuous operation with maintenance-free, lifetime-lubricated ball bearings, non-reversible.