more than 24" deep.
the opening must be at least 1 1/2" x 7".
the bottom of the slot must be at least 30" above floor.
the hood should not project more than 2 1/16" beyond the inside of the door.
on a horizontal slot, the hood should not extend below the bottom of the outside plate.
on a vertical slot, the hood should not extend beyond the side of the outside plate on same side as the door’s hinges. 