Hi guys, I have a question on cooling the house. So at night, I usually open windows to let all of the cold air come in and open the 2nd floor windows to let the hot air out. The 2nd floor is a large open area and has windows in the front and windows in the back. Now, I normally open all the windows on the first floor but am wondering if it necessary to open more than 1 window on the 2nd floor. The reason why I am wondering is because my goal is to have the first floor cool as I do not care too much about the temperature of the 2nd floor. The 2nd floor is also a big open area so air can freely flow around without much obstruction. I just need to know if opening 1 window will let all the heat out for the night and is adequate enough to cool down the 1st floor or will opening a few more windows on the 2nd floor will greatly benefit the first floor temperature? Thanks guys!