It prevents cluster heat from condensing on the cold inner cover, which can moisten the cluster during a vulnerable time of year.
Overwintering Insulation Heater Box Kit with Moisture Board, Lappe's Bee Supply's Overwintering Insulation Heater Box is the newest and one of the
5, 8 or 10 Frame Overwintering Insulation Heater Box
Easy On Beehive Cover
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How to winterize a beehive : r/Beekeeping
To insulate, or not insulate - that is the question!
Winterization with Moisture Board & Hot Box - Mann Lake Bee & Ag Supply
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This insulated (2inch insulation) inner cover is perfect for your 10 frame bee hive . Custom made, this cover or top is designed to keep your bees
Insulated Inner Cover For 10 Frame Bee Hive (2inch insulation) (Assembled)
First year beekeeping - Scientific Beekeeping
This telescoping outer cover provides excellent insulation, and with an upper entrance, will reduce condensation during the winter months. Use with a BeeMax ventilated wooden inner cover. Note: To remove the outer cover, simply place your palm in the center, apply pressure, and gently pull up at each of the corners Outer cover is designed to move back and forth, allowing you to create an upper entrance when paired with an inner cover.
BEEMAX Telescoping Beehive Outer Cover | Betterbee
Homemade hive wrap/ 1/2 foam board : r/Beekeeping
Wintering Bee Colonies
It's not much to look at but this is an absolutely essential piece of equipment for overwintering hives in cold climates. The dado on your inner cover
Winter Insulating Homasote Board
The Ultimate Inner Hive Cover reduces energy demand for healthier and happier bees that produce more honey and over winter more successfully. Multiple
Ultimate Insulated Inner Cover 8/10 Frame