Hi everyone !
I have an observation hive of 8 medium size frames in 4 story high.
The hive have a west entrance and is situated in a heated room.
I am situated 100 mi. (160 km) north of Vancouver, BC, we have  fairly mild winter with snow on the ground for about 3 to 4 months of the year.

What would be your suggestions for keeping that hive through the winter in its location.
My first concern would be nosema.