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Fireplace recess definition
NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Fireplace recess – a structural opening (sometimes called a builder's opening) formed in a wall or in a chimney breast, from which a chimney leads and which has a hearth at its base.
dwellingnon-domesticfluesFlue block chimney systems definition
NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Flue block chimney systems – a set of factory-made components made from precast concrete, clay or other masonry units that are designed for assembly on site to provide a complete chimney having the pe
fluescombustion-appliancesFlue box definition
NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Flue box – a factory-made unit, usually made of metal, which is similar to a prefabricated appliance chamber except that it is designed to accommodate a gas-burning appliance in conjunction with a fac
fluescombustion-appliancesgasConfiguration of natural draught flues serving open-flued appliances
2.40NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue system should offer least resistance to the passage of the flue gas by minimising changes in direction or horizontal length. Where practicable the flue should be straight and vertical except fo
combustion-appliancesfluesopen-fluedLimits on flue bends and changes of direction
2.41NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Provisions should be made to enable the flue to be swept and inspected. The number of changes of direction between the combustion appliance outlet and the flue outlet should be limited to not more tha
combustion-appliancesfluesopen-fluedmaintenanceOpenings in flues for inspection and cleaning
2.42NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue should not have an opening into more than one room or space except for the purposes of – (a) inspection or cleaning; or (b) fitting an explosion door, draught break, draught stabiliser or draug
combustion-appliancesfluesopen-fluedHeight of flues
3.9NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue should be high enough to ensure a sufficient draught to clear the products of combustion. The height necessary for this depends upon the type of appliance, the height of the building, the type
combustion-appliancesfluesSizes of flues for chimneys
Table 3.2NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Table 3.2 Sizes of flues for chimneys Installation(1) | Minimum flue size Fireplace with an opening of up to 500 mm x 550 mm. | 200 mm diameter or a rectangular/square section having the equivalent
combustion-appliancesflueschimneysFlue offset dimension increase
3.9(4)NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Should an offset be necessary in a flue, each flue size dimension should be increased by 25 mm (i.e. diameter or side).
combustion-appliancesfluesSize of natural draught flues for open-flued appliances
4.12NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue should be sized in accordance with Table 4.2 to suit the intended appliance and to ensure an adequate discharge velocity to prevent flow reversal problems but not to impose excessive flow resis
non-domesticdwellingfluesCE marked appliances - flue sizing
4.13NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
For an appliance that is CE marked as compliant with the Gas Appliances (Safety) Regulations 1995, the flue should be sized in accordance with the manufacturer's installation instructions.
non-domesticdwellingfluesFlue pipe sizing requirements
4.14NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
The flue pipe should be the same size as the appliance flue outlet and the flue should have at least the same cross-sectional area as that of the appliance flue outlet.
non-domesticdwellingfluesHeight of natural draught flues for open-flued appliances
4.15NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue should be high enough to ensure sufficient draught to safely clear the products of combustion. For an appliance that is CE marked as compliant with the Gas Appliances (Safety) Regulations 1995,
non-domesticdwellingfluesNon-CE marked appliances - flue height installation
4.16NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Where an older appliance that is not CE marked is to be used and it has no manufacturer's installation instructions it should be installed in accordance with – (a) the recommendations in BS 5871: Part
non-domesticdwellingfluesSize of flues for gas-fired appliances
Table 4.2NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Table 4.2 Size of flues for gas-fired appliances Intended installation | Minimum flue size Radiant/convector gas fire (new flue) | Circular - 125 mm diameter; Rectangular - 16500 mm2 cross-sectional
non-domesticdwellingfluesSize of flues (other than balanced flues and flues designed to discharge through or adjacent to walls)
5.5-5.7NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
5.5 A flue should be sized to suit the intended appliance such that it ensures an adequate discharge velocity to prevent flow reversal problems but does not impose excessive flow resistance. 5.6 The
combustion-appliancesfluesOutlets from flues and flue heights
5.8NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
5.8 The outlet from a flue should be so situated externally as to allow the safe dispersal of the products of combustion, the correct operation of a natural draught flue and, if a balanced flue, the i
combustion-appliancesfluesProtection of flue outlets
5.9-5.10NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
5.9 A flue outlet should be protected by a guard where – (a) a person could easily come into contact with it; or (b) it could be damaged. 5.10 If a flue outlet is in a vulnerable position, such as wh
combustion-appliancesfluessafetyFlue block chimney construction materials and standards
5.16NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue block chimney should be constructed from either – (a) a factory-made flue block system primarily designed for solid fuel, as described in paragraphs 2.23 and 2.24; or (b) a factory-made flue bl
combustion-appliancesfluesFlue block chimney installation and jointing
5.17NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue block chimney should be installed with sealed joints in accordance with the flue block manufacturer's installation instructions. Where bends or offsets are required, these should be formed usin
combustion-appliancesfluesProtection of combustible materials from flue heat dissipation
5.18NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Where the flue gas temperature is not expected to exceed 250ºC the combustible materials in the building fabric should be protected from the heat dissipation from a flue in accordance with the provisi
combustion-appliancesfluesfire-safetyFlue penetration of fire compartment boundaries
5.19NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Where a flue pipe or flue penetrates a fire compartment wall or floor, it must not breach the fire separation requirements of Part E of the Building Regulations.
combustion-appliancesfluesfire-safetyGuarding of flue pipes and factory-made chimneys
5.20NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue pipe flue and factory-made chimney should be guarded where – (a) they present a burn hazard to people that is not immediately apparent; or (b) they could be at risk of damage.
combustion-appliancesfluessafety