The mechanical ventilation system shall operate continuously.
Exceptions:
1. Mechanical ventilation systems that are interlocked with a gas detection system designed in accordance with the Chicago Fire Prevention Code.
2. Mechanical ventilation systems in garages that are used only for the repair of vehicles fueled by liquid fuels or odorized gases, such as CNG, where the ventilation system is electrically interlocked with the lighting circuit.
(Amend Coun. J. 9-14-21, p. 35949, Art. V, § 10)