.1 Ships carrying more than 36 passengers

The ventilation system shall, in addition to paragraph .1 of Regulation 32, also be in compliance with paragraphs .2.2 to .2.6, .2.8 and .2.9 of Regulation 32. In general, the ventilation fans shall be so disposed that the ducts reaching the various spaces remain within the main vertical zone. Where ventilation systems penetrate decks, precautions shall be taken, in addition to those relating to fire integrity of the deck required by Regulation II-2/A/12.1, to reduce the likelihood of smoke and hot gases passing from one between-deck space to another through the system. In addition to insulation requirements contained in this regulation, vertical ducts shall, if necessary, be insulated as required by the appropriate tables in Regulation 4. .4 Ventilation ducts shall be constructed of the following materials: ducts not less than 0,075 m^(2) in sectional area and all vertical ducts serving more than a single between-deck space shall be constructed of steel or other equivalent material; ducts less than 0,075 m^(2) in sectional area other than vertical ducts referred to in paragraph .1.4.1, shall be constructed of non-combustible materials. Where such ducts penetrate ‘A’ or ‘B’ class divisions due regard shall be given to ensuring the fire integrity of the division; short lengths of duct, not in general exceeding 0,02 m^(2) in sectional area nor two metres in length, need not be non-combustible provided that all of the following conditions are met: the duct is constructed of a material of low fire risk to the satisfaction of the Administration of the flag State; the duct is used only at the terminal end of the ventilation system, and the duct is not located closer than 600 mm measured along its length to a penetration of an ‘A’ or ‘B’ class division, including continuous ‘B’ class ceilings. instead of subparagraph .1 the following subparagraph .1a shall apply: the duct shall be of a material which has low flame spread characteristics. .5 Stairway enclosures shall be ventilated and shall be served only by an independent fan and duct system which shall not serve any other spaces in the ventilation system. All power ventilation, except machinery space and cargo space ventilation and any alternative system which may be required under subparagraph .9.2.6, shall be fitted with controls so grouped that all fans may be stopped from either of two separate positions which shall be situated as far apart as practicable. Controls provided for the power ventilation serving machinery spaces shall also be grouped so as to be operable from two positions, one of which shall be outside such spaces. Fans serving power ventilation systems to cargo spaces shall be capable of being stopped from a safe position outside such spaces. Where public spaces span three or more open decks and contain combustibles such as furniture and enclosed spaces such as shops, offices and restaurants, the space shall be equipped with a smoke extraction system. The smoke extraction system shall be activated by the required smoke detection system and be capable of manual control. The fans shall be sized such that the entire volume within the space can be exhausted in 10 minutes or less. Ventilation ducts shall be provided with suitably located hatches for inspection and cleaning, where reasonable and practicable. Exhaust ducts from galley ranges in which grease or fat is likely to accumulate shall meet requirements of paragraphs .9.2.3.2.1 and .9.2.3.2.2 and shall be fitted with: a grease trap readily removable for cleaning unless an alternative approved grease removal system is fitted; a fire damper located in the lower end of the duct which is automatically and remotely operated, and in addition a remotely operated fire damper located in the upper end of the duct; a fixed means for extinguishing a fire within the duct; remote control arrangements for shutting off the exhaust fans and supply fans, for operating the fire dampers mentioned in .2 and for operating the fire-extinguishing system, which shall be placed in a position close to the entrance to the galley. Where a multi-branch system is installed, means shall be provided to close all branches exhausting through the same main duct before an extinguishing medium is released into the system; and suitably located hatches for inspection and cleaning.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.