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ODSR Series "A" Outdoor Woodburning Fireplace
Side Wall Protection
Adjacent combustible side walls that are within the mini-
mum dimensions shown in Figure 24 of fireplace opening
must be protected with Vermont Castings Group Wall Shield
Model SP40 or a specifically built wall shield described
below.
The special wall shield design described in Figure 20 is an
alternate method of adding protection to side walls and can
be used in place of the SP40 with the same wall clearances
specified for the SP40. Rt must =1.85 minimum.
Examples of wall shield insulation:
1. Manville - CERAFORM 126, K=.27,
1/2 inches thick
2. Vermont Castings Group - EH2416, K = .458,
1 inch thick required.
Minimum Wall Clearances
WITH
Noncombustible
Surround Facing
4" BRICK
(Example material)
E
F**
A - Min. clearance
C**
to combustible
perpendicular wall
SIDE
B - Min. clearance
WALL
to combustible
perpendicular wall when
using noncombustible wall shield*
Combustible material permitted within shaded area.
* Noncombustible wall shield requires 1" EH2416 insulation
(minimum R Value = 1.85) between decorative
noncombustible rigid covering and combustible wall.
Minimum height and width is 40" x 40".
** Dimension/degree of angle will vary depending on thickness
of noncombustible surround facing.
ODSR36A
ODSR42A
Fig. 24 Combustible side wall protection and hearth extension dimensions.
16
WITHOUT
Noncombustible
Surround Facing
Shaded area starts
1/2" away from
edge of unit.
4"
FIREBOX
OPENING
SIDE
WALL
A
B
C
16"
12"
48°
406 mm 305 mm
20"
12"
42°
508 mm 305 mm
A hearth extension is required to protect a combustible floor
in front of the fireplace. Refer to Figure 24 for minimum
dimensions and mounting detail.
NOTE: hearth Extension must not cover the air inlet
opening of a fireplace.
The hearth extension described in Figure 24 must be a
durable noncombustible material with a minimum (total)
Rt value of 1.09; refer to Figure 25 for examples. The
overall height (above a combustible floor), depth and width
must be as indicated, with the extension centered to the
fireplace opening.
The top of insulation must be covered with a noncombus-
tible decorative covering or a piece of .018" minimum sheet
metal, to protect hearth extension material. (Fig. 24)
Secure the hearth extension to the floor to prevent shift-
ing, using trim molding or other similar means at three (3)
outer edges. Seal crack between the fireplace hearth and
hearth extension with a noncombustible material. (Figs.
24 and 26)
Minimum Hearth Extension Dimensions
(for On-Site Construction)
E
D
May install
noncombustible
decorative
covering
OR .018" min.
sheet metal
4" MIN.
COMBUSTIBLE
FLOOR
D
E
F
41°
18"
14"
457 mm
356 mm 203 mm
35°
18"
14"
457 mm
356 mm 292 mm
FP594
SR/SC
11/20/97
hearth Installation
G
H
J
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
FIREPLACE
HEARTH
MINIMUM
Safety strips
INSULATION
must overlap
VALUE "R"
" minimum
g
h
J
8"
16"
52"
406 mm 1320 mm
11¹⁄₂"
20"
65"
508 mm 1651 mm
G
FP594
20006811
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