for the stove which are outlined in this
handbook. The hearth should extend
by a minimum of 225mm (9”) from
the front of the stove (which includes
the edge of the ash lip). As a general
rule it is best to extend the hearth to at
least 75mm (3”) beyond the furthest
out-swing of the stove door to avoid
any potential live ash held on the door
falling on to combustible flooring or
floor coverings. If the top of the hearth
and any combustible floor coverings are
level with each other then a retaining
fender should be fitted to warn
occupants of the hearth area.
Alternatively, a 28mm (1.1”) change in
level provided by a decorative non-
combustible material such as stone,
marble, granite, ceramic tiles etc could
be used.
Please note that some materials, such
as marble, may not be suitable when
used as a single sheet and will need to
be pieced together to allow for
expansion from the heat of the stove.
Your stove dealer or installer should be
able to advise you about this.
The ‘Fireplace’ The stove can be sited
within a brick or stone fireplace recess
or used free-standing. The fireplace side
and rear walls should be at least 75mm
thick and made of non-combustible
brick or stone. In a fireplace setting you
should allow a minimum distance of
100mm (4”) from the back of the stove
and 150mm (6”) at either side with at
least 300mm (12”) from the top of the
stove. Ideally, the overall height of the
fireplace aperture should be at least
1200mm (4’) high.
Providing adequate air space around
24 25
regulations, whichever is the greater. A
combustible material is anything which
can burn once it gets hot enough and
includes skirting boards, wooden fire
surrounds, wooden mantles, wallpaper,
fabrics and floor coverings. Remember
these materials could be concealed
behind other materials which on the
surface may appear to be non-
combustible, for example, stud
partitioned walls.
GENERAL GUIDELINES
Please refer specifically to current
building regulations which apply to your
country or region (see page 8). Adopt
whichever provides the highest / safest
margin.
The Hearth The hearth should be
made of solid non-combustible
material, set on a firm and level base
and should be at least 125mm (5”)
thick. This can include the thickness of
any non-combustible floor under the
hearth or non-combustible decorative
surface. It must be capable of
supporting the weight of the stove
(when loaded) along with any attached
flue pipes which bear down on the
stove. This hearth must conform to
local building regulations which may
vary from country to country.
In England and Wales there is a
minimum requirement for the hearth
to project 500mm (20”) in front of any
brick or stone recess and 150mm (6”)
at each side of the recess. For a
free-standing stove the minimum
hearth size should be 840mm by
840mm (2’10” by 2’10” approx) and
should provide the minimum clearances
• The fireplace recess or opening is
suitably constructed and conforms to
all applicable building regulations and
can accommodate the stove along with
the safe minimum operating distances
required (see page 6 and 23).
• Any adjacent walls, next to which a
free-standing stove is installed, are of
a suitable thickness and are of non-
combustible material and conform to
all applicable building regulations.
• The air supply is sufficient for full
combustion of the stove’s fuel and
the health and safety of the room’s
occupants. Any extractor fans inside
the room should be removed or
permanently disabled. Note that in the
UK stoves above 5kW output require a
non-closable dedicated air supply within
the room which must conform to
applicable building regulations. The
AL907-SE has been officially rated at
8.0kW output when burning wood or
smokeless fuels.
• The chimney is of sufficient height,
is suitably constructed and is in good
condition and conforms to all applicable
building regulations regarding stove
installation. The minimum flue height
required for the Alpha II is 4.5 metres
from the hearth to the top of the
chimney terminal.
• The chimney has been swept and
tested prior to installation.
• The proximity of all combustible
materials to the intended stove
installation conforms to the minimum
requirements outlined within this
handbook (page 6) as well as local,
national and European building
the stove will allow the stove to
radiate heat and circulate warm air
around the room. It will also prevent
structural damage to the walls and
potentially damaging over-heating of
the stove. If it is not possible to
maintain these spaces they could be
reduced to 100mm (4”) at the sides but
only if this can be compensated with
twice the equivalent air space at the
top of the stove and the non-
combustible wall parts are at least
200mm (8”) thick.
Walls adjacent to free-standing stoves
should be made of non-combustible
material and be a minimum of 200mm
(8”) thick.
Flue Draught The minimum flue
draught requirement for the
AL907-SE is 6.2g/s (wood) and 7.6g/s
(smokeless fuels).
The Chimney, Flue and Flexible
Liners Other appliances should not
share or be connected to the same flue
system or chimney.
If you are using an existing chimney
and it has been checked for condition
and suitability (see below), in the
interests of safety you must ensure that
it is swept before the stove is installed,
even if it has never been used or you
intend to use a flexible liner. To find a
local registered sweep visit The National
Association of Chimney Sweeps at
www.chimneyworks.co.uk or the
Guild of Master Chimney Sweeps at
www.guildofmasterchimneysweeps.
co.uk.
The recommended minimum height
for the chimney / flue system from the