01——The fan filter of the electric box is mainly divided into two types: with fan and without fan. The models with fan are different mainly due to the difference of fan voltage, which can be divided into 230.115.380.012.024.048, etc. The model of the separate filter without fan is. 300

02——Each series has several sizes to choose from. At the same time, the fan size is different, and the corresponding fan ventilation will be different.

03——According to the principle that cold air is heavy and hot air is light, the cabinet generally arranges a fan filter device at the lower part of the cabinet, and a separate filter is installed at the upper part, so that the fan filter at the lower part can draw the outside cold air into the cabinet, and the cold air in the cabinet goes up against the hot air, so as to eliminate the outside of the cabinet and achieve the heat dissipation effect, and vice versa