StacksVerified U.S. regulatory reference

46 CFR §111.103-1

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Each power ventilation system that is not a machinery space ventilation system must have:
  1. (a)A control to stop the ventilation that is:
    1. (1)Outside the space ventilated; and
    2. (2)Grouped with the controls for every power ventilation system to which this section is applicable; and
  2. (b)In addition to the control required by paragraph (a), a stop control that is:
    1. (1)As far as practicable from the control required by paragraph (a) and grouped with the controls for every power ventilation system to which this section is applicable; or
    2. (2)The circuit breakers for ventilation grouped on the main switchboard and marked, “In Case of Fire Trip to Stop Ventilation.”