Along a similar idea, I've always wanted to adapt gas refrigerator technology to make a solar powered air conditioner. The hotter it is, the better it works! Should be great for Fresno, CA. Harold -- FCC Rules Updated Daily at http://www.hallikainen.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist