On a direct-drive whole-house fan where is the fan blade is supposed to be positioned compared to the motor on a whole-house fan?

Here is some information on the fan blade location for a direct-drive whole-house fan.

For the direct-drive whole-house fan products, the fan blade is mounted above the motor in assembly (it must be inverted before installation). The fan should be positioned on the motor shaft at an elevation that places the top 1/3 of the fan depth above the top edge of the fan shroud.