For wet and dry vacuum cleaner.
Bypass - Motor i.e. separate intake and cooling air, the lower part is sealed off and the electrical equipment is cooled by a built-in cooling fan. Peripheral air outlet, i.e. The intake air is blown out through the engine slots.
In this model, the intake air is sucked through a nozzle 36 mm, so the engine must not be mounted directly on the tank with dirty water that has the advantage that it leads to the intake hose guide (longer engine life).
Overall height 172 mm, height 69 mm turbine, turbine diameter 144 mm.