{"data":{"id":"us/46-cfr-108.455","jurisdiction":"us","citation":"46 CFR 108.455","heading":"Enclosure openings.","body":"(a) Mechanical ventilation for spaces protected by a CO2 system must be designed to shut down automatically when the system is activated.\n(b) Each space that is protected by a CO2 system and that has natural ventilation must have a means for closing that ventilation.\n(c) Each space protected by a CO2 system must have the following means for closing the openings to the space from outside the space:\n(1) Doors, shutters, or dampers for closing each opening in the lower portion of the space.\n(2) Doors, shutters, dampers or temporary means such as canvas or other material normally on board a unit may be used for closing each opening in the upper portion of the space.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER I-A—MOBILE OFFSHORE DRILLING UNITS","PART 108—DESIGN AND EQUIPMENT","Subpart D—Fire Extinguishing Systems"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"e18368572ba621710b950f3e99f8510179d1f2de302500c54fc7206fcc4c48e5","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-108.453","next":"us/46-cfr-108.457"},"notice":"GroundRules: Original legal text. Not legal advice."}