As I mentioned earlier when talking about the Red Hive... The Queen Excluder is used with a honey super. This keeps the Queen from laying brood in the honey reserve as she is too big to fit through the slats. It should not to be used year long. So, before the bees get too active in the Green Hive, I best get the Queen Excluder out of there. Here are my findings and, I might add, what happens when you make bad choices.