DX SFKX-AF TypeIntelligent Civil Air Defense Control Box with Fan InterlockThe extended product of the SFKX-A Intelligent Ventilation Mode Signal Control Box, in addition to the original functions, it adds control for the ventilation fans in the civil air defense basement. The fans can be automatically controlled according to the ventilation status requirements or manually started and stopped remotely in the control room. The control room can observe the start and stop status of the fans. An automatic dehumidifying device is set inside the control box to ensure stable operation of the equipment in high humidity and other harsh environments.