My understanding is we don't want to boil the Birch sap. Apparently the different sugars are likely to burn.
My thought is to convert my maple evaporator into a Birch evaporator when the mapl season is over.
I believe the modifications I will need is to adapt a tray for some firebrick to lay on directly under the pan. Therefore if the fire gets to hot, it will store into the brick and act like a crock pot.
Any thoughts?