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Debris collection space for chimneys
4.32NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A debris collection space should be provided at the base of a chimney unless it is lined, constructed of flue blocks, or is a factory-made metal chimney with a flue box. The space should have a volume
combustion-appliancechimneyflueBases for back boilers
4.33NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A back boiler should be adequately protected to shield the fabric of the building from heat by standing it on – (a) a hearth intended for a solid fuel appliance. See Diagram 3.7(a); or (b) unless othe
combustion-applianceback-boilerprotection-from-heatHearths for gas-burning appliances - installation conditions
4.34NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A gas-fired appliance should be placed on a hearth unless – (a) it is installed so that every part of any flame or incandescent material should be not less than 225 mm above the floor; or (b) the manu
non-domesticfire-safetycombustion-appliancegasHearth construction and dimensions
4.35NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Where a hearth is required, instructions on its minimum plan dimensions are given in Diagrams 4.6 and 4.7. The hearth should comprise of at least a layer of non-combustible, non-friable material not l
non-domesticfire-safetycombustion-appliancegashearth