Ventilation Fan 100mm GM RangeIt is a ventilation fan with a two way linkage. It can also expel heated air masses and draw in cold natural wind to provide ventilation in addition to removing smoke. High quality, steady, quiet, wear resistant sleeve bearing motor. Easy operation with overheat protection, effective temperature fuses, and safer operation On the initial pull, the fan activates and vents upward. On the second pull, the fan operates in reverse and blows air inward. The
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