1.6 Fireplace opening and chimney catchment space
The front opening of the fireplace must be between 400mm and 425mm wide and between
560mm and 570mm high.if the opening exceeds these dimensions then a surround must
be constructed from suitable non - combustible material to produce correct size
opening .any surround must be suitably sealed to the fireplace to prevent leakage
See below fig 1
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When installing into a brick built chimney,you must ensure that there is sufficient depth to
accommodate any debris which may fall from the chimney ,this depth must be sufficient to
accommodate 12 litres of volumetric space,minimum of 310mm
Issue 1
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445 minimum
410mm min
425mm max
570mm min
580mm max
590mm minimum
Fig 1
appliance
Min depth required
310mm
Void for flue debris
