Commercial kitchen extractor fan no wind fault how to deal with, the motor is good, as if the wind is not enough, is a little a fumes are not grieving out!
Should be the product design "insufficient", the fan blade angle is small (flat) and small power problems. It can't be repaired. If you force the fan blade to increase the angle, the power is small, the motor will "burn". Only to buy a large suction hood again (range hood installation, should try to close to the stove, does not affect the operation on the line).