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1. Open the wall for the chute by carefully removing the baseboard then using a utility knife to cut out a chunk of drywall
42 in. high down the center of each stud. Use a reciprocating saw or handsaw to cut out the base plate between the studs. Work the plate out carefully; the drywall and the trim on the opposite side might be nailed to it. Then cut a hole through the plywood floor for the duct to slide through. At the top of the cutout, install a 2x4 piece of blocking between the studs as a nailing surface for the frame of the laundry door.