Hi @skeggley, I don’t reduce my entrances as a rule, however I think it’s a good idea to do it. I have mainly reduced the entrances of nuc hives. For example: some nuc hives only have 4 or 5 frames of beesin 10 frame boxes, so I reduced those entrances considerably. We are having an unseasonal cold snap at the moment, I’m even wearing a cardigan under my bee suit:), in the mornings.
I have no idea what the commercial blokes do.
If you have a standard flow entrance, I can see no reason why you couldn’t reduce it down to one third, especially after some of the tiny entrances I’ve seen on this forum.