Los Angeles County Municipal Code § 910.4 Fire Code
Los Angeles County Municipal Code · 2026-09 edition · updated 2026-10-04 · Los Angeles County
Cite as: Los Angeles County Municipal Code § 910.4 · Text as of 2026-10-04
910.4.3 - System design criteria.¶
The mechanical smoke removal system shall be sized to exhaust the building at a minimum rate of two air changes per hour based on the volume of the building or portion thereof without contents. Mechanical smoke removal systems provided for basement-level enclosed parking garages shall be designed to provide a minimum of six complete air changes per hour. The capacity of each exhaust fan shall not exceed 30,000 cubic feet per minute (14.2 m 3 /s).
910.4.4 - Activation.¶
The mechanical smoke removal system shall be activated by manual controls only. For basement-level enclosed parking garages, mechanical smoke removal systems shall be automatically activated by the automatic sprinkler system or by heat detectors having operating characteristics equivalent to those described in Section 910.3. Individual manual controls for each fan unit shall also be provided.
912 - FIRE DEPARTMENT CONNECTIONS
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