When installing a ventilation hood with air extraction mode and a chimney-vented fireplace, the hood's power supply line needs a suitable safety switch.
The window contact switch is suitable for this purpose.
The ventilation 400 series and Vario downdraft ventilation 200 series have a connecting contact for a window contact switch.
The ventilation appliance only works when the window is open if a window contact switch is connected. The lighting works even if the window is closed.
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