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SR/SC Series "A" Woodburning Fireplace
Side Wall Protection
Adjacent combustible side walls that are within the
minimum dimensions shown in Figure 23 of fireplace
opening must be protected with CFM Corporation 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. CFM Corporation - 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" CFM Corporation
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.
SR/SC36A
SR/SC42A
Fig. 23 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°
406mm 305mm
20"
12"
42°
508mm 305mm
A hearth extension is required to protect a combustible
floor in front of the fireplace. Refer to Figure 23 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 23 must be a
durable noncombustible material with a minimum
(total) Rt value of 1.09; refer to Figure 24 for ex-
amples. 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 noncom-
bustible decorative covering or a piece of .018"
minimum sheet metal, to protect hearth extension
material. (Fig. 23)
Secure the hearth extension to the floor to prevent
shifting, using trim molding or other similar means at
three (3) outer edges. Seal crack between the fire-
place hearth and hearth extension with a noncombus-
tible material. (Figs. 23 and 25)
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"
457mm
356mm
35°
18"
14"
457mm
356mm
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
7 "
16"
48"
197mm
406mm 1219mm
11 "
20"
61 "
292mm
508mm 1562mm
G
FP594
7412948
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