We have three of these and love them.  We live in Florida and leave them in the windows year round but there are a few days, really hot or really cold, that I do take them out.  It's not that much trouble but it'd sure be nice if Vornado made some simple covers for the front, maybe hold on by elastic and hooks into the handles, that could be put on, and taken off, in seconds.  Just sayin'.  :)