Blaze King Wood Stove (Maple) Bypass Handle for PE/KE units.Your catalytic wood burning appliance has a bypass device to allow the smoke from the fire to temporarily bypass, or go around, the catalytic combustor. The bypass door is located inside the firebox at the top of the stove. The bypass is a steel plate door, hinged inside the stove, and is controlled by the bypass handle on the stove.NEVER OPEN THE LOADING DOOR WITHOUT OPENING THE BYPASS DOOR.