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Design Guide
MANDATORY REQUIREMENTS
Connection to an appliance which is not connected to the fuel supply, should be carried out
by a competent person. We recommend the use of HETAS approved installers for solid fuel
applications. If installation is carried out by a non HETAS registered installer, the installation must
be certified by a local Building Control inspector. Connection to an appliance that is connected to
the fuel supply must be carried out by a Gas Safe (Gas) or OFTEC (Oil) registered installer.
The design guide must be read in conjunction with the detailed component installation
instructions.
For full design and installation details the key referral documents are:
• BS EN 1856-2: Connecting Flue Pipes and Chimney Liners
• BS EN 1859: Metal Chimneys - Testing Methods
• BS EN 1443: Chimneys - General Requirements
• BS EN 15287-1: Chimneys. Design, installation and commissioning of chimneys. Chimneys for
non-room sealed heating appliances.
• Approved Document J: - Combustion appliances and fuel storage systems (England & Wales)
• DFP Technical Booklet L: - Combustion appliances and fuel storage systems (NI)
• Technical Handbook (Domestic & Non Domestic), Section 3 - Environment (Scotland)
• Appliance Installation Instructions and related standards. Other standards covering specific
applications will also be relevant and must be adhered to.
Planning permission for a System Chimney may be required, and reference should be made to the
local Building Control Department.
Ensure all chimney components are available and check them to ensure there has been no
damage. Do not use damaged components.
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