A ³⁄₄" marble slab set in ¹⁄₂" mortar covers the brick, “R” for the marble and mortar becomes:
“R”M = r x TM = 0.09 x ³⁄₄" = .068 “R”M = r x TM = 0.20 x ¹⁄₂" = .10
The sum of all “R values” is:
.70 + .10 +. 068 + .10 = .968
This would not be an acceptable combination of material for the hearth extension since the total calculated “R value” of the materials used is under the required “R value” of 2.33. An additional layer of insulating materials must be used.
WARNING: THE CRACK BETWEEN THE FIREPLACE AND THE HEARTH EXTENSION MUST BE SEALED WITH A NON- COMBUSTIBLE MATERIAL.
WARNING: WHEN INSTALLING HEARTH EXTENSION IN FRONT OF A
7"
Max. Thickness Of Hearth Extension When
Figure 50
WARNING: WHEN INSTALLING THE HEARTH EXTENSION BE CAREFUL NOT TO BLOCK THE
WARNING: WHEN INSTALLING HEARTH EXTENSION IN FRONT OF A CIRCULATING FIREPLACE MODEL, THE FIREPLACE MUST BE RAISED IF HEIGHT OF HEARTH EXTENSION EXCEEDS 2" ABOVE BOTTOM OF FIREPLACE (FIGURE 51 ).
18
5 1/2"
2"
Max. Thickness Of Hearth Extension When Circulating Models Are On The Floor
Figure 51
Secure the hearth extension to the floor to prevent possible shifting.
FINISH TO YOUR TASTEThere are a wide variety of “finished looks” for these fireplaces, from formal wall decor with elaborate mantels to rustic wood paneling or warm brick facings.
Only noncombustible materials like stone, tile, brick, etc., may overlap the black front facing. Do not extend these materials beyond the black facing and into the firebox area. Be sure not to interfere with the installation and operation of glass doors or block the upper or lower grilles. Seal all joints between the black facing and wall surrounds to prevent air intrusion. Use non- combustible caulking material only to seal the black metal facing to the surround material on the finished wall.
Combustible materials may project beyond the sides of the fireplace opening as long as they are kept within the shaded areas illustrated in Figure 52.
Combustible |
|
|
|
Materials |
|
| Fireplace |
Allowed In |
|
| |
Shaded Area |
|
|
|
“Safe Zone” |
|
| 1" |
| 9" |
| |
|
|
| |
|
| 45° |
|
12" |
|
| Min. Distance To |
|
| 9" | |
|
| Protected Side Wall | |
|
|
| |
| 12" |
| Min. Distance To |
|
| Unprotected Side Wall | |
|
|
|
Figure 52
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
The following items are available for use in the installation of this appliance.
Chimney Section | 63L10 | |
| 63L13 | |
| 63L14 | |
| 63L15 | |
Canadian | 62L92 | |
Chimney Section | 62L93 | |
|
|
|
Storm Collar | 63L59 | FSC |
Locking Band | 63L60 | FLB |
Take Off Boot | 91L04 | FATO |
Unit Mounted |
|
|
Blower Switch Kit | 91L48 | FUBSK |
|
|
|
Shipping Weight |
| 188 lbs. |