a hive "chimney" that would allow rising hot air to escape is an idea that was briefly mentioned on a forum. The question got me to thinking and as I was out with my dogs this evening I had an idea: Drilling holes into the length of a "false" top bar, stapling on some screening and placing these bars on the ends next to the follower boards (for center entrance hives). Rising hot air would easily exit which would especially reduce condensation over the winter months. I wonder how the bees would like this...and how they would react. Ideas?