To add the perfect finishing touch to a roof window installation, FAKRO rain and wind sensors provide peace of mind that roof windows will close automatically in adverse weather conditions. The ZRD Rain Sensor has a heating element which prevents it being activated by dew and misty conditions while the ZWD Wind Sensor can be set for activation at wind strengths between 5-40km/hour. Both are only 55 x 50mm but are highly durable.
For back-up power, a set of emergency batteries enable window operation to continue in the event of power failure. Battery capacity is sufficient to open and close windows connected to the control unit several times.