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INSTALLATIONS
F5.1 An oil-fired appliance with a net input rating not more than 70 kW, and any associated chimney, flue-pipe and hearth, must be constructed and installed in accordance with the requirements of F3.1 to F3.12 (general) and F5.2 to F5.13.
APPLIANCES
F5.2* An oil-fired appliance must be suitable for its purpose and the class of oil that it will burn.
SUPPLY OF AIR FOR COMBUSTION
F5.3* An oil-fired appliance installed in a room or space must have an adequate supply of air for combustion by way of permanent ventilation either direct to the open air or to an adjoining space (including a sub-floor space) which is itself permanently ventilated direct to the open air, (see also F3.11)
except -
where the appliance is a room-sealed appliance.
SUPPLY OF AIR FOR COOLING
F5.4* An oil-fired appliance installed in an appliance compartment must have an adequate supply of air for cooling by way of permanent ventilation, in addition to air for combustion, either direct to the open air or to an adjoining space (including a sub-floor space).
REMOVAL OF PRODUCTS OF COMBUSTION
F5.5 Each oil-fired appliance must be connected to a separate flue,
except -
where the appliance has a pressure jet burner and is connected into a suitable shared flue.
F5.6 An oil-fired appliance installed in a bathroom, shower-room or room intended for use as sleeping accommodation must be a room-sealed appliance.
F5.7* A chimney or flue-pipe serving an oil-fired appliance must be suitable for use with the type of appliance served.
F5.8* A chimney or flue-pipe serving an oil-fired appliance must be constructed and installed in accordance with the requirements of F4.7 to F4.9, and F4.11 to F4.16 (solid fuel),
except -
a. where the flue gas temperature will be not more than 250º C under normal working conditions (as determined by an appropriate test procedure), the chimney or flue-pipe may be in accordance with the requirements of F6.8, F6.9 and F6.11 to F6.15 (gas); and
b. where the oil-fired appliance burns Class D fuel, the inner surfaces of the chimney or flue-pipe must not be manufactured from aluminium.
F5.9 The angle of any change of direction in a flue must not be more than 45º from the vertical,
except -
where the flue serves an appliance employing a pressure jet burner.
F5.10*The outlet from a flue must be situated externally at a safe distance from any opening, obstruction or combustible material.
RELATIONSHIP TO COMBUSTIBLE MATERIALS
F5.11*An oil-fired appliance must stand on a hearth constructed and installed in accordance with the requirements of F4.17 and F4.20 (solid fuel),
except -
a. where the appliance will not cause the temperature of the floor to be more than 100º C under normal working conditions (as determined by an appropriate test procedure), the appliance may stand on, or incorporate, a rigid, non-combustible, non-absorbent, imperforate base, of at least the plan dimensions of the appliance; or
b. where the appliance is designed not to stand on a hearth it must incorporate a rigid, non-combustible, non-absorbent, imperforate base of at least the plan dimensions of the appliance.
F5.12*Where an oil-fired appliance is installed on a hearth it must be positioned on the hearth in such a way as to minimise the risk of ignition of any part of the floor by direct radiation or conduction.
F5.13*An oil-fired appliance must be separated from any combustible material, where the temperature of the back, sides or top of the appliance will be more than 100º C under normal working conditions (as determined by an appropriate test procedure) by -
a. a shield of non-combustible material at least 25mm thick; or
b. an air space of at least 75mm.
Diagram to F5.13: Appliance separation from combustible material
INSTALLATIONS
F6.1 A gas-fired appliance with a net input rating not more than 70 kW, and any associated chimney, flue-pipe and hearth, must be constructed and installed in accordance with the requirements of F3.1 to F3.12 (general) and F6.2 to F6.17.
APPLIANCES
F6.2* A gas-fired appliance must be suitable for its intended purpose.
SUPPLY OF AIR FOR COMBUSTION
F6.3* A gas-fired appliance installed in a room or space must have an adequate supply of air for combustion. (See also F3.11)
SUPPLY OF AIR FOR COOLING
F6.4* A gas-fired appliance installed in an appliance compartment must have an adequate supply of air for cooling.
REMOVAL OF PRODUCTS OF COMBUSTION
F6.5* Each gas-fired appliance that requires a flue, must connect into a separate flue,
except -
where it connects into a suitable shared flue.
F6.6* A chimney or flue-pipe serving a gas-fired appliance must be suitable for use with the type of appliance served.
F6.7* The area of a flue must be suitable for the type of gas-fired appliance(s) served.
F6.8 A flue must have no intermediate openings,
except -
a. a draught stabiliser, draught diverter or relief air opening, that is in the same room or space as the gas-fired appliance being served;
b. an opening for inspection or cleaning, that is fitted with a non-combustible, rigid, gas-tight cover.
F6.9* A flue-pipe must not be fixed externally to a building,
except -
where the flue-pipe is a double-walled flue-pipe suitable for external use.
F6.10*The outlet from a flue must be situated externally at a safe distance from any opening, obstruction or combustible material.
PROTECTION FROM PRODUCTS OF COMBUSTION
F6.11*A flue-pipe must be of suitable material.
F6.12 A flue-pipe must not pass through a compartment wall, compartment floor, separating wall or separating floor,
except -
where the flue-pipe is totally enclosed within a casing of non-combustible material providing at least half the fire resistance required from each side, for the compartment wall, compartment floor, separating wall or separating floor.
F6.13*A flue-pipe must be adequately protected, to prevent damage to the pipe or danger to people, where it passes through a room or accessible space other than that containing the gas-fired appliance that it serves.
RELATIONSHIP TO COMBUSTIBLE MATERIALS
F6.14 A flue-pipe must not pass through a wall, floor, roof, ceiling or partition constructed of combustible material,
except -
a. where the temperature of the flue gases in the flue-pipe will be not more than 100º C; or
b. where the flue-pipe is enclosed in a sleeve of non-combustible material and separated from the sleeve by an air space of at least 25mm; or
c. where flue-pipe is a double-walled flue-pipe.
Diagrams to F6.14b and c: Flue-pipes passing through combustible material
F6.15 A flue-pipe must be placed -
a. where it is a single-walled flue-pipe, with its outer surface at least 25mm from any combustible material;
b. where it is a double-walled flue-pipe, with the inner surface of its inner wall at least 25mm from any combustible material,
except -
where the temperature of the flue gases will be not more than 100º C.
Diagram to F6.15: Flue-pipes in relationship to combustible material
F6.16* A gas-fired appliance must be provided with a suitable hearth,
except -
a. where every part of any flame or incandescent material in the appliance is at least 225mm above the floor;
b. where the appliance is designed not to stand on a hearth.
F6.17*A gas-fired appliance and any associated draught diverter must be placed at a safe distance from any combustible material.
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