StacksVerified U.S. regulatory reference

46 CFR §153.312

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
A cargo handling space ventilation system must meet the following:
  1. (a)A ventilation system exhaust duct must discharge no less than 10 m (approx. 32.8 ft) from openings into or ventilation intakes for, accommodation or service spaces.
  2. (b)A ventilation system must not recycle vapors from ventilation discharges.
  3. (c)Except for the space served by the ventilation duct, a ventilation duct must not pass through a machinery room, an accommodation space, or working spaces.
  4. (d)A ventilation system must be operable from outside the space it ventilates.
  5. (e)A ventilation system must be sized to change the air in the ventilated space at least 30 times per hour.
  6. (f)A ventilation system must not allow air to stagnate in any part of a ventilated space.
  7. (g)A ventilation system must be able to exhaust air from both above and below the deck plates of a ventilated space.