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If a partition stops at a distance of 2 feet or more below ceiling level, the partition shall not be considered to form an independent room; the space on both sides of the partition shall be considered to form one room. A grille with an opening of not less than 75 percent free area may be placed in the 2 feet space. Door height shall not be considered to be part of the partition.
If a mechanical ventilating system is used in a public garage, the system shall not be required to operate continuously if the system is equipped with an approved detection device that operates automatically upon detection of a concentration of carbon monoxide of 50 parts per million (ppm). The minimum density of carbon monoxide detectors shall be one detector for every 5,000 square feet of garage floor area. If the general exhaust of a building is discharged into a mechanically-exhausted public garage, the garage exhaust system shall exhaust at least 100 percent of the ordinance required air.
The applicant for any permit ventilation schedule in a form substantially similar to Table 18-28-403.14 shall be submitted with permit plans to demonstrate compliance with the Ventilation Article of this chapter.
Ventilation | |||||||||||
Room Description | Ordinance Requirements | Actual Provided | Remarks/ Room Function | ||||||||
Natural Light & Ventil. (SF) | Mechanical Ventil. (CFM) | Natural Light & Ventil. (SF) | Mechanical Ventil. (CFM) | ||||||||
Room No. | Room Name | Floor Area (Sf) | Glass Area | Vent Area | Supply Area | Exhaust Air from Room | Glass Area | Vent Area | Supply Air | Exhaust Air from Room | |
– | – | – | – | – | – | – | – | – | – | – | – |
1. Generator Rooms. A room or rooms with generator(s) shall meet air flow and combustion air requirements as noted in the Chicago Electrical Code, 18-27-701*, Legally Required Standby Generating Systems - Ventilating Air.
* Editor's note – Chapter 18-27 was repealed by Coun. J. 9-6-17, p. 55278, Art. III.
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