The reason why the negative pressure fan is called negative pressure is because its air volume is extremely large. During the operation of the fan, the indoor hot air can be discharged at a fast speed according to its air volume, forming a low-pressure area, which is negative pressure compared with the outdoor, so that the outdoor air will enter the indoor and form convection The role of a virtuous circle.

There are three types of negative pressure fans on the market: glass fiber reinforced plastic, stainless steel and galvanized materials.

The difference between these three fans is that the entire FRP fan is made of FRP. It can discharge indoor odor, dust, and hot air. If it is used with other equipment, the effect is even better. It can be used in factories, electronics factories, supermarkets, farms, and many large spaces with bad environments that require cooling and humidity.

The material of stainless steel is the whole machine stainless steel, and its shape is more beautiful than other fans.

The galvanized shell is made of galvanized material, which is slightly worse than the other two fans. When choosing to buy galvanized fans, please note that if your company is in a coastal or humid place, it is recommended to change to other Style, because the fan of this material is easy to rust in wet or acid environment.

In addition to paying attention to the material of the negative pressure fan, it should also be noted whether the drive mode of the fan is DC drive or belt drive. Relatively speaking, DC transmission is better than belt transmission, because the belt is easy to wear during the operation of the fan.