Most everyone here seems to use double brood chambers exclusively. In my locality, upper state SC, I never see anyone using double brood chambers, and I know a lot of beekeepers. I did a search and read on another thread that many of the southern beekeepers only use single brood chambers and double broods are more the practice up north. The reasons some of the local experts give me are ease of mobility and handling, and having tried doubles but seeing little difference in honey production. I am thinking about trying a double brood on one of my hives next year for increased honey production to see what happens. Intersestingly no one uses medium supers here and you cannot even find them in the local beekeeping stores here. Is this just a regional idiosencrisy or is there a deeper reason?