Re: Top Bar thickness and condensation?
Mr Bush is recommending a single [top] entrance.
Originally Posted by shannonswyatt
Bees seem to have more trouble ventilating a vertical hive with no vent at the top. They have to force dry air (which wants to go down) up to the top and hot moist air at the top (which wants to go up), back down and out the bottom. It's sort of like walking 20 miles to school, uphill both ways. So a top vent or top entrance in a vertical hive seems to be very helpful as it allows the hot moist air out the top which sucks the dry air in the bottom. With a horizontal hive, this is not an issue. They just move the air in a circular fashion in one side and back out the other side and out the door. Sort of like a nice level walk with no hills. This seems to work well. With cross ventilation (such as a front and back vent or entrance) the wind may blow through the hive and that may be a bad thing.
USDA Zone 7a - elevation 1400 ft