16
ODSR Series "A" Outdoor Woodburning Fireplace
20006811
Minimum Wall Clearances
WITH
Noncombustible
Surround Facing
WITHOUT
Noncombustible
Surround Facing
Minimum Hearth Extension Dimensions
(for On-Site Construction)
G
H
G
J
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
Safety strips
must overlap
56O
" minimum
May install
noncombustible
decorative
covering
OR
.018" min.
sheet metal
FIREPLACE
HEARTH
COMBUSTIBLE
FLOOR
MINIMUM
INSULATION
VALUE "R"
4" MIN.
FP594
SR/SC
11/20/97
FIREBOX
OPENING
A -
Min. clearance
to combustible
perpendicular wall
B -
Min. clearance
to combustible
perpendicular wall when
using noncombustible wall shield*
SIDE
WALL
SIDE
WALL
F
**
C
**
E
E
D
4" BRICK
(Example material)
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.
4"
Shaded area starts
1/2" away from
edge of unit.
FP594
Fig. 24
Combustible side wall protection and hearth extension dimensions.
A
B
C
D
E
F
g
h
J
ODSR36A
16"
12"
48° 41°
18"
14"
8"
16"
52"
406 mm 305 mm
457 mm 356 mm 203 mm 406 mm 1320 mm
ODSR42A
20"
12"
42° 35°
18"
14"
11
¹⁄₂
"
20"
65"
508 mm 305 mm
457 mm 356 mm 292 mm 508 mm 1651 mm
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.
hearth Installation
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)