Description
There is two forms for different air flow direction:
CW.
When viewed from the side, blade pitch angled down from left to right. Air away from the motor (Forced) with anti clockwise (ACW) motor rotation.
ACW.
When viewed from the side, blade pitch angled up from left to right. Air over the motor (Induced) with anti clockwise (ACW) motor rotation.
Note: motor shaft rotation is usually described when viewed from shaft end. If motor rotation is clockwise (CW) then the opposite blade type to above is used for correct air flow direction. ie. CW blade will provide air over motor (induced) and ACW will provide air away from motor (forced).