Operating the Fan-tastic fan

[LexGTS265ds]

How is the best way to operate the Fan-tastic fan? We have cool nights and hot days here in the Carson Valley. My fan has a thermostat control. With the in/out function and thermostat, I wonder the best way to trap the cool morning air and dispell the hot afternoon air to minimize the use of the air conditioner. In/out, closing windows, etc? Anyone with experience in this?

 

[Dakota 1120]

When it's cool outside, use the fan to suck air in....windows open helps.
When hot inside, use fan to blow air out so A/C doesn't have to work so hard to cool the interior.....then off once temp inside is dropping, windows closed.
Just how I do it.