i heard of a ice vest, not sure where to buy or price, but basically it allows u to b in hot temps and feel cool. would b good to use on hot summer days so u can keep ur windows closed :P
I don't know about the ice vests, but I've got chronic back pain and I've got a wide belt (about 8" wide) that I can keep in the freezer so when the pain gets really bad. Those are available at about any medical supply and they're not very expensive. I think I paid less the $30. for mine and worth every penny when my back has really bad days. I may have to try using it for an a/c unit. I'd never thought of that. If anyone knows where to find the ice vests please post it.