Maybe I'm only thinking about this because my water pipes are in my attic and the "cold" water tap runs about 95 degrees during the day, but somebody posted a link to Solar Attic a while ago. It looks like a really great idea. I'd buy one if I wasn't in @#$ Houston.

http://www.solarattic.com

http://www.poolforum.com/pf2/showthr...ht=solar+attic

Maybe you folks who often have "Cold" could use this for something. I'd suspect an attic fan that blew out across a grid of pipes from your pump return would be an even more energy efficient idea since it would bring cold air from outside into your attic through the eves. (Yeah, we do that a lot down here.)