If, or rather when they do fog up, here is someone that can fix them without
having to replace the sealed window unit.

http://www.ccwwi.com/

Per


"dean" wrote in message
oups.com...
Are they air tight? I mean, even after several years they still don't
get misted up inside, but I can't imagine how (with all the cold and
warm contractions and expansion) they ever manage not to leak somehow?
Am I missing some kind of magic here?

TIA!

Dean