Fan

DHF/DYF
DYF Fire Smoke Exhaust Fan
The fire exhaust fan mainly refers to the exhaust of thick smoke when a fire occurs indoors. The fire exhaust fan has a smoke exhaust valve, which is usually closed and automatically opens when a fire occurs. It is connected to the alarm host. The opening condition is that the automatic alarm system has a fire alarm, the fire alarm host is in automatic state, the fire exhaust valve automatically opens, and the fire exhaust fan starts.