ODSHR Outdoor Woodburning Fireplace
Side Wall Protection
40"
Min.
Adjacent combustible side walls that are within dimen- sions shown in Figure 25 of fireplace opening must be protected with CFM Corporation Wall Shield Model SP40 or a specifically built wall shield described in Figure 26.
The special wall shield design described in Figure 26 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 |
Decorative Non- combustible Rigid Covering
FP838
40" Min.
Noncombustible Insula-
tion
RT = 1.85 Min.
(Manville Ceraform 126
-1/2" Thick or CFM Corporation EH2416 - 1" Thick)
2. CFM Corporation - 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 27 for mini- mum dimensions and mounting detail.
NOTE: Hearth Extension must not cover the air inlet opening of a fireplace.
The hearth extension described in Figure 27 must be a durable noncombustible material with a minimum (total) Rt value of 1.09; refer to Figure 28 for examples. The overall height (above a combustible floor), depth and width must be as indicated, with the extension centered to the fireplace opening.
Fig. 26 Noncombustible wall shield dimensions.
The top of insulation must be covered with a
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 fireplace hearth and hearth extension with a noncombustible material. (Figs. 27, and 29 - 31)
WARNING: HEARTH EXTENSION MUST BE IN- STALLED IN ACCORDANCE WITH FIGURE 24.
Minimum Wall Clearances
WITH | WITHOUT |
| |
Noncombustible | Noncombustible | ||
Surround Facing | Surround Facing | ||
|
| Shaded area starts | |
4" Brick |
| 3/4" away from | |
(Example material) |
| edge of unit |
|
|
| 4" |
|
18" 14"** | Firebox | 18" | 39���" |
| Opening |
| |
32���"** | 22" - Min. clearance |
|
|
| to combustible |
|
|
| perpendicular wall |
|
|
Side | 18" - Min. clearance | Side | |
Wall | to combustible | Wall | |
| 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.
Minimum Hearth Extension Dimensions
(for
| 20" | 12" | 12" |
|
|
|
| 66" |
|
| Seal cracks |
|
| |
May install | between the |
|
| |
noncombustible | fireplace |
|
|
|
decorative | and hearth |
|
|
|
covering | extension with |
|
| |
OR .018" min. | noncombustible |
|
| |
sheet metal | material |
| Fireplace |
|
|
|
| Hearth |
|
4" Min. |
|
|
|
|
Combustible | Minimum | Safety strips |
| |
Floor | Insulation | must overlap |
| |
| Value "R": | ���" minimum | FP532b | |
|
|
|
| |
Fig. 27 Combustible side wall protection and hearth extension dimensions.
16 | 20002264 |