Vermont Castings 1920 Homeowner's Installation And Operating Manual page 8

Aspen Woodburning Stove
®
hearths
This appliance must be installed on to hearth that
meets the requirements of Part J of the Building Regu-
lations 000 (Combustion Appliances and Fuel Storage
Systems). This can be achieved by ensuring that the
hearth is constructed and sized in accordance with the
guidelines included in section  of approved document
'J'. The size and clearances of the hearth are as fol-
lows:
The constructed hearth should be constructed in ac-
cordance with the recommendations in document J,
and should be of minimum width 840 mm and minimum
depth 840 mm (if a free standing hearth b) above) or
a minimum projection of 150 mm from the jamb (if a
recessed hearth a) above).
Appliance
Doors
At least
150 mm
Perimeter should be
clearly marked e.g.
edge of superimposed
hearth
a) fireplace recess
fig. 8 Noncombustible hearth surface dimensions.
Wood framing
requires protection
from radiant heat
fig. 9 Supporting timbers under fireplace hearths are
considered to be combustible.
8
Costructional Hearth
Dimensions as below
Hearth Surface
Free of Com-
bustible Material
At least
300 mm
ST247
Rear exit floor dgrm
12/14/99 djt
floor protection for fireplace installation
Do not assume that your fireplace hearth is completely
noncombustible. Many fireplace hearths do not satisfy
the "completely noncombustible" requirement because
the brick or concrete in front of the fireplace opening
is supported by heavy wood framing. Because heat
is readily conducted by brick or concrete, it can easily
pass through to the wood. As a result, such fireplace
hearths can be a fire hazard and are considered a com-
bustible floor.
For all fireplace installations, follow the floor protection
guidelines described above.
Keep in mind that many raised hearths will extend less
than the required clearance from the front of the heater
when it is installed. In such cases, sufficient floor
Appliance
Doors
Perimeter should be
clearly marked e.g.
edge of superimposed
hearth
b) free standing
tion on fireplace and mantel trim shields in this section.
ST47
protection as described
above must be added
At least 150 mm
in front of the hearth
or to a suitable
to satisfy the minimum
heat resistant wall
floor protector require-
ment from the front of
the stove: 406 mm
(16").
Hearth rugs do not sat-
isfy the requirements
for floor protection as
they are only fire-retar-
dant, not fire proof.
Fireplace installations
also have special
clearance require-
ments to the side walls,
ST91
side decorative trim
and fireplace mantel.
Refer to the informa-
30003844