Originally Posted by pepar
There's the rub, I wasn't planning on keeping mine running 24/7. Or should I? Sometimes two weeks pass without me using my theater.
As long as you have good airflow (proper amount of fans, space between drives, etc.) within your server, the temperatures will be kept at acceptable levels and will not cause problems on or off. It would be very difficult to create conditions inside the server that would cause condensation. (Perhaps if you had Liquid Nitrogen cooling)
I'm surprised to hear that your basement fluctuates that much between winter and summer. My current basement stays between 68-72 the whole year, and I keep my server on 24/7 (it serves my websites and other endeavors) without any problems.