Have you ever been a guest in a hotel and cranked your AC down to the max? Well of course you have because isn’t that what everyone does in hotel rooms. Anyway, in doing so have you ever then experienced the subtle noises throughout the night of drapery blowing out into the room, tapping the glass and continuing like a broken record throughout the night? The sound is always just loud enough to be very disturbing to sleep but not quite obnoxious enough to merit getting up and turning down the AC. Regardless that movement of the drapery into the room is what the industry calls ‘billowing’ and it is a factor we try our best to solve.