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Table A - Installation Depth Requirements for a Flavel Caress HE being
installed into a brick built chimney, requiring 12.0 litres of debris collection
volume (figure 2).
When installing this product into a brick built chimney, there must be a minimum
depth available of 300mm available for the collection of debris behind the firebox
when installed.
See figure 2a below for explanatory diagram.
Fig. 2a
VOID FOR FLUE DEBRIS COLLECTION
Depth Required
300mm
Minimum
Firebox
1.7 FITTING TO PRE-FABRICATED TWIN WALL METAL FLUE BOXES
The appliance may be fitted to twin wall metal flue boxes conforming to the
constructional requirements of BS 715, (for example the Selkirk LFE 175 box).
The box must have a minimum flue diameter of 125mm internal and minimum
internal dimensions of 275mm deep by 580mm high by 400mm wide. The top face
of the box must be insulated with a minimum thickness of 50mm of
non-combustible mineral wool insulation or similar material. The flue box must
stand on a non-combustible base of minimum thickness 12mm if the flue box
being utilised is of single skin construction.
1.8
HEARTHS
This appliance must only be installed on to a concrete or non-combustible hearth.
The hearth material must be a minimum thickness of 12mm with the top surface at
least 50mm above the floor. The hearth must be fitted symmetrically about the fire
opening and have a minimum width of 760mm and a minimum projection of
300mm forwards from the fire opening.
7
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