3.4
The flue must conform to
BS 5440: Part 1 in design and
installation.
The flue, measured from the
bottom of the fireplace opening
to the bottom of the terminal,
shall be not less than 3m in
actual vertical height. When
calculated in accordance with
BS 5440: Part 1 Annex A, the
minimum
equivalent
height of
the flue shall be 2.0m of
125mm dia. flue pipe.
3.5
The flue must not be used
for any other appliance or
application.
3.6
Any chimney damper or
restrictor should be removed. If
removal is not possible, they
must be secured in the open
position.
3.7
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.
3.8
If the fireplace opening is an underfloor draught type, it must be sealed to stop any
draughts.
3.9
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 purpose made proprietary class “O”- 150°C surround. The hearth material
must be at least 12mm thick. The periphery of the hearth (or fender) should be at least
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INSTALLER GUIDE
Figure 3.Precast or clay flue block system
