Small fan with ball bearings. Plastic housing protected against water jets (IP 45) with grille. The upward-facing slats completely prevent the dirty intake opening and the built-in guide vane from being seen. 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. With run-on switch, run-on time 2 to 8 minutes. Impeller with 5 profiled plastic blades, high efficiency. AC shaded-pole motor with thermal overload protection for continuous operation with maintenance-free, lifetime-lubricated ball bearings, non-reversible.