hive ventilation - sauna or chimney?

[Antipodes]

Just in case useful for others, Randy Oliver gave a great presentation about overwintering bees. Dispels the chimney idea. Bees need insulation and sealed upper chambers, and the ventilated floor would be better off closed in winter, and the entrance reduced to a minumum.



Well that truly buries the breathable Warre hive cushion idea! And I would like to swap out ventilated floors for solid for winter.

I'm part way through it...for the second time!
Solid floors...what he says at 31.34 min. onwards is to be well noted.
39 min. onwards about nosema is very interesting. Discussions on winter brooding at 41 min. and on is great too.