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objects. Wind effects can also be created by natur-
al land contours.
To minimise the wind effects, the flue termination
point should be located a minimum of 1000mm from
the roof measured vertically and 2300mm measured
horizontally. Where this termination point does not
suffice it may be necessary to extend the flue pipe
so that the termination point is above the apex.
Fig.2
Appliance
FLUE PIPES
A flue pipe should only be used to connect an appli-
ance to a chimney and should not pass through any
roof space.
Flue pipes may be of any of the following materials:
(a) Cast iron as described in BS 41: 1973 (1981),
or
(b) Mild steel with a wall thickness of at least 3mm,
or
(c) Stainless steel with a wall thickness of at least
1mm and as described in BS EN 10095:
1999 Specification for stainless and
heat resisting steel plate, sheet and strip, for
Grade 316 S11, 316 S13, 316 S16, 316 S31,
316 S33, or the equivalent Euronorm 88-71
designation, or
(d) Vitreous enamelled steel complying with BS
6999: 1989.
Flue pipes with spigot and socket joints should be fit-
ted with the socket uppermost.
2300
Soot Door
CHIMNEY
The stove is a radiant room heater and must be con-
nected to a chimney of the proper size and type. The
chimney must have a cross sectional area of at least
19350 square mm (30 square inches) or a diameter
of 150mm (6"). The chimney should be checked for
soundness and draught before installation. The
stove must be connected to a chimney with a mini-
mum continuous draught of 12pa. Poor draught will
result in poor performance. Similarly an excessive
draught will result in the appliance over firing or
being difficult to control. An excessive draught may
require a flue draught stabiliser to be fitted. Do not
connect this appliance to a chimney serving another
appliance. The minimum required chimney height is
4.5 metres from the floor on which the appliance is
installed. An existing masonry chimney should be
inspected and if necessary, repaired by a competent
mason.
If the stove is fitted in place of an open fire then the
chimney should be swept one month after installa-
tion to clear any soot falls which may have occurred
due to the difference in combustion between the
stove and the open fire.
DOWN DRAUGHTS
However well designed constructed and positioned,
the satisfactory performance of the flue can be
adversely affected by down draught caused by near-
by hills, adjacent tall buildings or trees. These can
deflect wind to blow directly down the flue or create
a zone of low pressure over the terminal. A suitable
anti-down draught terminal or cowl will usually effec-
tively combat direct down blow but no cowl is likely
to prevent down draught due to a low pressure zone.
VENTILATION & COMBUSTION AIR
REQUIREMENTS
This appliance is rated at less than 9kW. It is imper-
ative that there is sufficient air supply to the stove in
order to support correct combustion. The air supply
to this appliance must comply with B.S. 8303: Part 1
and current Building Regulations. The minimum
effective air requirement for this appliance is 22cm
If a draught stabiliser is used then this increases to
2
49cm
.
When calculating combustion air requirement for
this appliance use the following equation: a total free
area of at least 550mm
above 5kW shall be provided. If there is another air
using appliance fitted in the same or adjacent room,
it will be necessary to calculate additional air supply.
All materials used in the manufacture of air vents
should be such that the vent is dimensionally stable
and corrosion resistant.
4
2
per kW of rated output
2
.
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