Important: If the sensor is mounted on the wall, it should always be mounted at the height of the head area, as Air Quality data should be recorded at this height. If the sensor is mounted on the ceiling, the measurement is primarily concerned with the occupancy of a zone, so the sensor should then be mounted as centrally as possible above the furniture of the zone to be detected. The motion sensor has a larger angle in the length of the sensor, therefore the longer side of the sensor should be aligned with the longer side of the zone.