Code of practice for flues and flue structures in buildings
Code of practice for flues and flue structures in buildings
1 Scope This code of practice gives recommendations for the design and construction of flue linings and flue structures serving appliances (boilers and air heaters) of 45 kW output and above, burning solid, liquid or gaseous fuels. The recommendations contained in this code may be used for the design of a flue serving an incinerator, which should be provided with its own individual flue . Prior approval of the height of the chimney by the local authority is required by Section 6 of the Clean Air Act 1968 where the appliance(s) served by the chimney burn(s) (a) pulverized fuel or (b) 45 kg or more of solid fuel per hour or (c) liquid or gaseous fuel at a rate of 366 kW or more if:
(1) a new chimney is erected to serve a new or existing installation; or
(2) an installation (e.g. of boilers, incinerators) served by an existing chimney is enlarged, e.g. its combustion capacity is increased, or an additional appliance is added to the system; or
(3) an appliance served by an existing chimney is removed and replaced by one having a larger combustion capacity.
The official publication
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