To Jim et al: Probably like many others I have been following this Tbh thread closely and find it very interesting! I may have missed something along the way-like "how well can a tbh winter up in these colder climates in New England & North into Canada?" I always thought that you really need two supers to get thru a winter-in case it gets real frigid. [I always err on the safer side.] As near as I can see, tbh's are really about the depth of one full super, more or less? Since I always thought bees move upward in the winter - what happens in a tbh? They don't go sideways do they? Or is it more a matter of keeping closer tabs on whether or not they need a little feed at some point? Regards, Al -- Al Needham * Scituate,MA,USA * [log in to unmask] >"The HoneyBee"-An Educational Software Program V1.0< Available at: Http://www.kuai.se/~beeman/