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INSTALLER'S GUIDE
2.19 The minimum allowable distance from the outside of the appliance case to a corner
wall having combustible material or any other combustible surface which projects
beyond the front of the appliance is shown in figure 5.
A 10mm access clearance from a non-combustible surface is necessary at the left side.
See figure 5.
Dimension X is 50mm. This can be deleted when installing into a pre-cast or clay flue
block system.
Figure 5. Appliance dimensions
2.20 Proprietary terminals must comply with BS 715 or BS 1289. Any terminal or
termination must be positioned in accordance with BS 5440 Part 1 to ensure that the
products of combustion can be safely dispersed into the outside atmosphere. Where the
appliance is connected to an unlined brick chimney it is generally unnecessary for the
chimney pot to be replaced or for a terminal to be fitted unless the flue has a diameter
smaller than 170mm.
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