Wireless 4 Way SwitchA wireless 4 way switch plus boost to manually adjust ventilation rate. It allows the user to control the speed of airflow for when the building is occupied, not occupied or when a boost is necessary The red LED warning light illuminates when filters need checking, this same LED will flash to indicate a fault on the machine Can be used on Flair units (later than 2022) and Ease units Suitable for battery operation or hard wiring (Battery included,
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