---Shatter: High strength hot-galvanized steel sheet, with a centrifugal system it will turn on automaticly. Shatter will turn off and seal under the influence of gravity of springs when the ventilation equipment go off, which can effectively prevent and prohibit the ray outside from shiningthrough and make the indoor air ventilation optimized.

---Frame: Galvanized steel sheet, the layer of the galvanizationis 150g/m2, and the frame is one-off molded, also there is out let in the bottom.

---Fan Blades: 6 pieces of Ger many-imported mirror finished stainless steel blades, the fan translations all have passed the experiment of homeostasis, which makes the air volume keep the same as the very beginning during the operational life span of the fan.

---Belt Pulley: The v type belt pulley is aluminium magnesium alloy injecction moulded, so it is light and high- strength.

---Belt: The belt is imported from Japan, it is a ametabolic in a longtime so there is no use to maintain it during its life circle.

--- Motor: The motor is high efficiency and low wastage of energy and have accredited 3C certification; the Grade of

Protection is IP 54 and the insulation Grade is F.

--- Free Maintenance: There is no use to maintain it during its life circle.