@Etienne
One other thing is entrance hydraulic resistance. For a conventional entrance
the length over diameter ratio is about 1 but for tree entrances its about 7.
This a big difference.
This also means less light in the nest.
re your sensors and temps, I would really need a picture of the hive and the
sensor positions. Interpreting temperatures as heat flows is a mine field
and doing it once removed is even more so.
Derek
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