Table 1. Flue sizing table.
Page 8
Into a fireplace that has a fireback of nominal size 400mm and conforming to BS1251.
Into a Baxi Fires Division replacement chairbrick. Part number 0552391
Suitable flues and minimum flue sizes are as follows: -
225mm × 225mm conventional brick flue.
175mm diameter lined brick or stone flue.
200mm diameter factory made insulated flue manufactured to BS4543.
175mm diameter flue pipe. See BS6461 Part 1 for suitable materials.
The minimum effective height of the flue must be 3m.
The flue must not be used for any other appliance or application.
Any chimney damper or restrictor should be removed. If removal is not possible, they must be secured in the
open position.
If the appliance is intended to be installed to a chimney that was previously used for solid fuel, the flue must
be swept clean prior to installation.
All flues should be inspected for soundness and freedom from blockages.
4.3
If the fireplace opening is an underfloor draught type, it must be sealed to stop any draughts.
4.4
The appliance must be mounted behind a non-combustible hearth (N.B. conglomerate marble hearths are
considered as non-combustible). The appliance can be fitted to a minimum class "O" - 100°C surround. The
hearth material must be at least 12mm thick. The periphery of the hearth (or fender) should be at least 50mm
above floor level to discourage the placing of carpets or rugs over it (See
figure 1
or
2
).
The surface of the hearth must be sufficiently flat to enable the bottom of the fascia and the bottom front cover
to be aligned horizontally. Any excessive unevenness (uneven tiles, Cotswold stone, etc.) should be rectified.
Page 9
4.4.1.
'Hole-in-the-wall' Installations
For installation without the Spanish basket casting.
z
It is recommended that a hearth should be installed as in
figure 1
.
For installation with the Spanish basket casting.
z
It is recommended that a hearth should be installed as in
figure 2
.
For installation with and without the Spanish basket casting.
Page 7 of 25
20/08/2012
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