9.32.1.

(1) This Section applies to the ventilation of rooms and spaces in residential occupancies by natural ventilation and to self-contained mechanical ventilation systems serving only one dwelling unit.

(2) Mechanical ventilation systems, other than self-contained systems serving single dwelling units, shall conform to Part 6.

(3) Ventilation of rooms and spaces in other than residential occupancies shall conform to Part 6.

(4) A storage garage for more than 5 cars shall be ventilated in accordance with Part 6.

(5) A clothes dryer exhaust duct system shall conform to Part 6.

(1) Every dwelling unit that is supplied with electrical power shall be provided with a mechanical ventilation system in accordance with Subsection 9.32.3.

(1) Except as permitted in Sentence (2), rooms or spaces in a dwelling unit shall be ventilated by natural means in accordance with Subsection 9.32.2.

(2) The natural ventilation of rooms or spaces required in Sentence (1) may be provided by mechanical means.

(3) Where a room or space is not provided with natural ventilation as described in Sentence (1), mechanical ventilation shall be provided to exhaust inside air from or to introduce outside air to that room or space at the rate of one-half air change per hour if the room or space is mechanically cooled in summer, and one air change per hour if it is not.