Flavel Curve Installation And Maintenance Instructions Manual page 7

Table A - Installation Depth Requirements for a Flavel Curve being installed
into a brick built chimney, requiring 12.0 litres of debris collection volume
(fig. 2).
When installing this product into a builders opening / brick-built chimney, the depth
required is a minimum of 156mm. The 12.0 litres of debris collection volume is
achieved by the space available below the flue spigot.
This appliance is suitable for use in fireplaces fitted with an existing chairbrick
without the need for removal of the chairbrick, providing the minimum depth of the
fireplace exceeds 206mm. If the depth is less than 206mm then the chairbrick
must be removed. The fireplace must be checked to ensure that no part of the
chairbrick is within 50mm of the flue outlet of the fire when installed.
For example, if the appliance was to be fitted into a 300mm wide opening, the
depth required would be 156mm. See fig. 2 below for explanatory diagram.
Fig. 2
Closure Plate
Side View
Plan View
Spigot
Opening Width ( e.g. 300mm)
7
Rear face of fireplace
opening
Depth Required 156mm
minimum for a brickbuilt chimney