If an automatic opening vent (AOV) is less than 2.5m above floor height and closes automatically, the trap hazard risk needs to be addressed, as a requirement of BS EN 60335-2-103:2003.

The PIR Sensor OS2/ NVLogiQ uses Passive Infrared (PIR) technology, to detect movement of persons in its coverage zone. When the PIR Sensor OS2/ NVLogiQ activates, a signal is sent to the OS2 Control System which stops the window instantly. If the obstruction is removed after activation the window will continue its operation.

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PIR Sensor OS2/ NVLogiQ Data sheet