no. i'm going to wait until it starts falling and guess if it's heat escaping out or the air overpowering.

i want to stop it from escaping, but if the air is overpowering i want to keep the window open.

as stated, the consequence of the cooling system in an enclosed basement is a meat locker. the window must be open at least some of the time. i just want to see if i can get away with sucking the heat in during the day and then keeping it in overnight, then sucking more in during the day, etc - rather than just keeping it open all the time.

see, it's going to be pumping upstairs if i close the window, and outside if i don't.

so, it's a question of just how much energy i can pull in.