Alright, as many of you know i am stuck in a dorm room folding with uncontrollable baseboard heating and i'm looking at possible solutions to this that doesn't involve tampering with the baseboard or having my window wide open all day (makes me cold sometimes). All this so i can

24/7 and not have a warm room.
This had lead me to the following idea. I plan on running some air condition (or dryer) ducting from my window to my tower case. I have a few questions about this though:
1. How do i prevent serious moisture from entering my pc (aka rain or snow as it blows into my window sometimes). I was thinking that the fact that its not going to be straight from the window to the case that any upperward bends should prevent this.
2. Air filter. I am probably going to go with pantyhose to prevent any outside air particles (dust and crap) from getting into my pc through the ducting by putting it over the opening at the window however is there any other possible alternatives as well.
3. Where should i put it? Now i'm not sure if it would be better to have the ducting go to the input fan on the side of my case (as it would only hit the gpus) or if i should put it at the front where it'll more likely be blown against the ram, NB, HSF and cool the interior (which would drop the gpu temps down a bit by lower interior case temp).
4. If i am missing anything or additional suggestions or tips would be welcome. I plan on doing it this weekend. I'll hope to have pictures of the final product however the only cameras i have are my webcam and cellphone, both are 1.3 MegaPixels with no zoom.