MULTI FAN

Blade material: 66 nylons with 30% fiberglass material.

Shutter/Frame galvanized sheet zinc coat: 275g/ m2

The shutter is assembled separately, which can be used together with the exhaust fan orbe taken off when the fan running always outside is clean no need shutter, just assemble a net onto in is ok. When the fans need to be stopped for a period of time, like in winter etc, then assemble the shutter to protect the fan and inside house.

This kind of shutter no need push pull button, the shutter opens automatically when thefan runs. When it stops, there is magnet on it for keeping the shutters close silently andsafe.