This is the most recently updated combustion blower motor for the Mt Vernon AE pellet stove, Mt Vernon AE pellet insert, and the Edge60 built-in fireplace. Prior replacement motors came with a housing assembly which is no longer offered.
This motor has a hub with two mounting configurations. The outer holes accommodate newer-style housings that use 6 phillips-head screws to secure the motor.
If you have an older style motor housing, simply remove the 6 off-set screws and nuts attached to the hub of the new motor to accommodate the off-set threaded posts used on the older housings.