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Make sure that none of these parts are missing before beginning installation. If there are parts missing stop the installation and contact Premier Mounts. INW42 Plenum INW50 Plenum INW60 Plenum (4) 6/32” Hex nuts (3) 10/32” Kep nuts (4) 6/32” Phillips screws (1) Muffin fan (1) Muffin fan bracket Opening the wall structure Opening the wall structure NOTE: It is assumed that the room ambient air temperature and conditions where the INW-series is to be incorporated is suitable to maintain an accept