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Add: "Clarification: An air handler unit may be not be located in a mechanical closet or room that only opens into the garage unless the following are met: 1) the mechanical closet that holds the AHU is fully isolated from the garage; 2) the mechanical closet is directly connected to the living space or outdoors; 3) the doors to the mechanical closet are sealed and gasketed; 4) the doors to the mechanical closet are either self-closing OR tied to a trigger that prevents the AHU from operating when the doors are open OR clear signage is posted to keep the doors closed at all times and t