This automatically opens or closes the vent door depending on fan operation (opens when fan is operating; closes when fan is off).
This allows ventilation with outside air during fan operation and saves energy during outside temperature drops.
PDK3A : Power Door Kit 230/208V
PDK4A : Power Door Kit 265V
This automatically opens or closes the vent door depending on fan operation (opens when fan is operating; closes when fan is off).
This allows ventilation with outside air during fan operation and saves energy during outside temperature drops.
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