Question: Cool off the house
Options:
If you don't have a fan, you can continue to just open and close the door causing a slight breeze each time you open it, thus drawing cool air into the home.
If the temperature outside is cooler than inside, you put a fan in a window and draw the cool air in to lower the temperature.
Answer: If the temperature outside is cooler than inside, you put a fan in a window and draw the cool air in to lower the temperature.