I had two double-deep hives going into winter here in Chicago-land. Both weighed about 140 on October 12th. Both are coming in right now at around 118 lbs give or take a pound.
So, my hives consumed around 22 lbs in 4 months, or about 5 1/2 lbs per month. That number should skyrocket once brood rearing hits hard.
Not bad. Both hives are well insulated with 2" foam.
I figure I have at least 40 lbs of stores in each hive, and 2 more months of Winter left. Now if they can just manage to stay alive until mid April . . .
Hey Finski, how do those numbers compare with your climate?
in published figures for insulated hives in Norway, they consumed 8 to 11kg for the entire winter. 40 lbs of stores is basically alot of chemical heat , that heat has to go somewhere... if not out the roof and sides, it has to go out the vent.... bees obey the laws of thermodynamics... the same as steam engines spaceship, ants, the sun the stars and the planet. You are running at over twice the heat loss you could do.
This is a very interesting perspective -thank you derekm--