My business has a swamp cooler (evaporative), but none of the windows open so I have no way to vent air. There is a vent in the alcove (?) over my front door facing downward. The vent is about the size of a box fan. I have been thinking about putting one face down on top of the vent.
If this is not a good idea is there a better option? I have an outlet not too far from the area, but do not think that there is anywhere near to hard wire. I could run a wire out the vent for a solar panel, but the awning is north west facing.
Vent opening:
With fan laying on top:
You could always build a plywood box/cube thing to duct the airflow downward, but with an opening on the side so you can use any cheap box fan.
That has been a thought too.
If you don't care how it looks, and you're specifically blowing air in with the box fan, you can just use a large garbage bag to direct the air in. Mount the fan vertically facing the opening, cut open a trash bag, and attach it to the remaining three edges of the opening and your fan.
If it's stupid and it works, it's not stupid.