Window openers & chain actuators
A motor/actuator that opens and closes a window sash itself (e.g. for ventilation or smoke control), distinct from motors that actuate a window covering mounted over the window — this sub-type drives the window unit, not a covering attached to it.
What it's called
In German: Fensterantrieb, Kettenantrieb. In French: ouvre-fenêtre électrique, motorisation de fenêtre.
— means no value: the manufacturer does not publish it, it does not apply to this product type, or there is none on record. Value states