I'm curious to see who else is planning on venting their mining rig to the outdoors.

According to the wiki page, that's a max of 375w per card. 1500w just to power the cards.

That's converting 1500w of electricity to heat, 24/7. It's like turning on a blow dryer and just letting it sit there.

Water cooling them will just move the heat from the cards to the radiator. (water pumps also require power and generate heat.)