46 CFR §116.600

1. (a)An enclosed or partially enclosed space within a vessel must be adequately ventilated in a manner suitable for the purpose of the space.
2. (b)A power ventilation system must be capable of being shut down from the pilot house.
3. (c)An enclosed passenger or crew accommodation space and any other space occupied by a crew member on a regular basis must be ventilated by a power ventilation system unless natural ventilation in all ordinary weather conditions is satisfactory to the OCMI.
4. (d)An exhaust duct over a frying vat or a grill must be at least 11 U.S. Standard Gauge (USSG) steel.