// CODE SNIPPET
909.21.1.1 Use of Ventilation Systems
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Ventilation systems, other than hoistway supply air systems, are permitted to be used to exhaust air from adjacent spaces on the fire floor, two floors immediately below and one floor immediately above the fire floor to the building's exterior where necessary to maintain positive pressure relationships as required in Section 909.21.1 during operation of the elevator shaft pressurization system.
Related Code Sections
909.21.1.1 Fire Protection and Life Safety Systems, Use of Ventilation Systems
Ventilation systems, other than hoistway supply air systems, are permitted to be used to exhaust air from adjacent spaces on the fire floor, two ...
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