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909.21.4 Fan System
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The fan system provided for the pressurization system shall be as required by Sections 909.21.4.1 through 909.21.4.4.
Where located within the building, the fan system that provides the pressurization shall be protected with the same fire-resistance rating required for the elevator shaft enclosure.
The fan system shall be equipped with a smoke detector that will automatically shut down the fan system when smoke is detected within the system.
A separate fan system shall be used for each elevator hoistway.
The supply fan shall be either adjustable with a capacity of not less than 1,000 cfm (0.4719 m3/s) per door, or that specified by a registered design professional to meet the requirements of a designed pressurization system.
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Building Code 2018 of Illinois > 9 Fire Protection and Life Safety Systems > 909 Smoke Control Systems > 909.21 Elevator Hoistway Pressurization Alternative > 909.21.4 Fan System > 909.21.4.3 Separate Systems