9
Vermont Castings Aspen
®
II Multi-Fuel
30003892
Costructional Hearth
Dimensions as below
At least
300 mm
At least 150 mm
or to a suitable
heat resistant wall
At least
150 mm
Hearth Surface
Free of Com-
bustible Material
Perimeter should be
clearly marked e.g.
edge of superimposed
hearth
Perimeter should be
clearly marked e.g.
edge of superimposed
hearth
Appliance
Doors
Appliance
Doors
ST912
fig. 9
Noncombustible hearth surface dimensions.
a) fireplace recess
b) free standing
the stove and moveable combustible items such as dry-
ing clothes, furniture, newspapers, firewood, etc. Keep-
ing those clearance areas empty assures that nearby
surfaces and objects will not overheat.
clearances
as with any solid fuel heating stove, extremely high
surface temperatures can occur, particularly in the
event of uncontrolled operation, e.g. if the doors
are inadvertently left open. it is crucial that suf-
ficient clearances are allowed to any combustible
surfaces, e.g. wooden mantels or lintels, and to
timber framed (studded) walls even if they are faced
with noncombustible board. detailed information
on fireplace and hearth construction is provided
in section 2 of document j, all installations must
comply with these requirements or with the relevant
National or local building standards.
Clearances to timber framed (studded) walls are includ-
ed below. There are no specific minimum clearances
to solid
noncombustible
surfaces (e.g. the sides and
rear of Inglenook fire openings constructed from solid
masonry) other than to allow safe access to the controls
of the stove. For this reason minimum side clearances
of 125 mm, and a minimum rear clearance of 50 mm
are recommended.
Summary of clearances
minimum recommended side clearances to non-
combustible surfaces 125 mm (5”).
minimum recommended rear clearance to noncom-
bustible surfaces 50 mm (2”).
Note:
The minimum thickness of solid noncombustible
materials is specified in section 2 of Document ‘J’, in
relation to the clearance of the appliance from the sur-
face. As a general rule, the thickness of solid noncom-
bustible material forming the recess of a fireplace is a
minimum of 200 mm.
minimum rear clearance from combustible walls
(e.g. timber framed or studded walls) 760 mm (30”)
measured from the rear edge of the stove top. (fig.
10, b)
minimum side clearance from combustible walls
610 mm (24”) measured from the side edge of the
stove top. (fig. 10, a)
minimum distance from stove to movable combus-
tible materials (e.g. furniture, drying clothes, etc.)
1220 mm (48”).
ST486a
Defiant EU
Clearance
Diagrams
10/06
A
B
ST486a
fig. 10
Minimum clearances.
connecting flue pipe - clearances
Single wall connecting fluepipes can reach extremely
high temperatures; therefore, clearances from the con-
necting fluepipe (chimney connector) must comply with
the requirements of Part J of Building Regulations 2000
(Combustion Appliances and Fuel Storage Systems).
This can be achieved by following the recommenda-
tions of Approved Document ‘J’. These are as shown in
Figure 11.
