Does a computer cause heat? p.2?

Well, it depends on how big your room is. First, if you ever take your computer off your desk or wherever you have it after a good day's use and feel the bottom of it, you could probably cook an egg on it. If you're room is small, I wouldn't be suprised if it made your room hot, but not really really hot. So, what I think you should do is buy a cooling mat/pad if you have a laptop, and if you have a desktop, place the desktop in a place where it can properly ventalate out the back. And, also, if you really need to, get a better fan unit.