(1) General. – Every room used, or intended to be used, for gain or reward for the cleaning or treatment of garments, textiles or other such materials, with the aid of flammable liquids or substances (here-inafter referred to as a dry-cleaning room), shall comply with the requirements of this section.

(2) No dry-cleaning room shall be located in a basement or in any other place where the floor surface of such room is below the mean finished ground-level immediately surrounding such room, and no such room shall be used for any purpose other than that described in this section or purposes incidental thereto.

(3) Every wall, floor and ceiling of a dry-cleaning room shall be constructed of non-combustible materials having a fire-resistance rating of not less than two hours.

(4) Doors and windows. – Every door leading from a dry-cleaning room shall be a self-closing fire-door, and have a fire-resistance rating of not less than one hour.

(5) There shall be at least two such doors, opening outwards direct to the open air, hung to frames having a raised sill of concrete or other approved non-combustible material of not less than 150 millimetres in height.

(6) The fenestrations of such room shall provide openable windows having an aggregate area of not less than 10 per centum of the floor area of such room.

(7) All windows shall be glazed with wire-woven glass of not less than 6 millimetres in thickness.

(8) All doors and windows of such room shall be at least 4,5 metres from the nearest lateral boundary of the stand on which is erected the building in which such room is situate or from another building on the same stand.

(9) Lighting and electrical equipment. – All lighting and electrical equipment in a dry-cleaning room shall comply with the following requirements—

a) no artificial lighting other than electric lighting shall be used;

b) all electrical fittings and equipment shall be flameproof and vapourproof, and all wiring thereto shall be through seamless, screwed, metal conduit which shall be effectively bonded to earth;

c) fuses and circuit breakers shall be located outside such room;

d) one push button switch, so constructed and connected as to provide means of stopping all machinery in case of an emergency, shall be provided in such room in an easily accessible position.

(10) Motive power. – Where any equipment is driven by means of shafting from motive power outside the dry-cleaning room, the driving-shaft shall pass through a gas-proof wall-box, which shall be installed at the point in the wall where such shafting enters such room.

(11) Steam-supply system. – Every dry-cleaning room shall be provided with a steam-supply system complying with the following requirements—

a) steam shall be reticulated through steam-piping of not less than 25 millimetres in nominal bore provided with perforations or jets of not less than 6 millimetres in diameter;

b) the piping shall be so disposed, and the perforations or jets so spaced, as to give, as far as practicable, a dispersion of steam sufficient to flood such room with steam within one minute, in the event of an outbreak of fire;

c) a steam-trap, or other means of preventing the accumulation of water in such piping, shall be provided;

d) an adequate steam-supply shall be maintained continuously while any flammable liquid is contained in any dry-cleaning equipment in such room;

e) the boiler, or other equipment used for generating steam for a steam-supply system, shall be placed outside such room;

f) the service-line of such system shall be provided with a stop-valve, situated outside such room, in an easily accessible position.

(12) Ventilation. – Every dry-cleaning room shall be ventilated by means of a mechanical system of exhaust and inlet ventilation of such design, construction and capacity as will adequately remove flammable liquid vapour from such room, and discharge such vapour into the air in such manner that it does not create a public nuisance, and shall comply with the following further requirements—

a) such system shall cause the air in the room to be changed at least 30 times in every hour;

b) the blades of all ventilating-fans shall be made of non-ferrous metal;

c) all exhaust ventilation-ducts shall be installed with the lower edges not less than 150 millimetres and not more than 300 millimetres above the level of the floor and shall be as near as practicable to the points of origin of flammable liquid vapour emanating from the dry-cleaning equipment;

d) fresh-air intakes shall be located not less than 2,1 metres above the level of the floor.

(13) Signs. – The words “DANGER: NO SMOKING”, in block letters of not less than 150 millimetres in height, shall be conspicuously displayed outside and inside every entrance to every dry-cleaning room, and shall at all times be maintained in a legible condition.