NO power roof ventilation fan

Description:

1.Main size:100mm,160mm,200mm,300mm360mm,400mm,450mm,500mm,600mm,680mm,800mm, 900mm,1000mm,1200mm

2. Main Material :SS201 SS304 Aluminum alloy for choice

3. Advantage:

*Ventilation effect, zero cost operation

* Excellent material

*Wide applicability, no possibility of water leakage

4.Special design:

*The guide vane designed by the turbine is unique, which can make the rainwater flow down the river without water seepage and achieve 98% waterproof effect

*The humanized variable angle design 300, 500, 600, 880 can be installed quickly and nimbly at the angle of 0 ~ 22.5

*Special airtight adopts NSK / Harbin Bearing of Japanese Seiko, which can ensure the normal operation of the product under small wind force and maintenance free forever

*The turbine exhaust fan only needs a breeze with a wind speed of 0.2m, and the indoor and outdoor temperature difference is more than 0.5c, so it can rotate light and effectively exhaust gas, and operate continuously