- Unique design of blade flow-guiding makes rain adhering to the blade drip to the bottom of the ventilator smoothly.
- The rain adhering to the revolving ventilator isolates from the surface of ventilator under the centrifugal force.
- Wind exhausted from the ventilator effectively prevents rainwater from flowing in the ventilator.
Brief introduction of Bernouli principle:
The sum of static pressure and dynamic pressure is a constant, i.e. the greater the fluid speed is, the smaller the pressure is.