**protection system**
1. Power outage and phase loss protection, high voltage and low voltage alarm system.
2. Lightning protection system.
3. Emergency start of fan function in case of malfunction.
4. No fan operation protection system.
5. Motor, fan, and water pump fault protection system.

**IoT system**
1. The mobile monitoring system can monitor the environmental parameters in the viewing room within a 4G range nationwide.
2. Remote operation of group control function is possible.