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 be an acceptable combination of material for the hearth extension since the total calculated “R value” of the materials used exceeds the required “R value” of 0.78.

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 NON-CIRCULATING FIREPLACE MODEL, THE FIREPLACE MUST BE RAISED IF HEIGHT OF HEARTH EXTENSION EXCEEDS 7" ABOVE THEBOTTOMOFFIREPLACE(FIGURE50 ).

7"

Max. Thickness Of Hearth Extension When

Non-Circulating Models Are On The Floor

Figure 50

WARNING: WHEN INSTALLING THE HEARTH EXTENSION BE CAREFUL NOT TO BLOCK THE HEAT-CIRCULATING AIR INLET GRILL ON CIRCULATING MODELS.

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 TASTE

There 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"

 

8"

 

 

 

 

 

 

45°

 

12"

 

 

Min. Distance To

 

 

8"

 

 

Protected Side Wall

 

 

 

 

12"

 

Min. Distance To

 

 

Unprotected Side Wall

 

 

 

Figure 52

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

INSTALLATION COMPONENTS

The following items are available for use in the installation of this appliance.

Chimney Section

63L10

FTF8-12

 

63L13

FTF8-18

 

63L14

FTF8-36

 

63L15

FTF8-48

Canadian

62L92

FTF8-18C

Chimney Section

62L93

FTF8-36C

 

 

 

Outside Combustion Air Kits

 

(with duct)

81L87

FOAK

(without duct)

81L88

FOAK-LD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Combination

 

 

Offset/Return Elbow

63L28

FTF8-OR15

Take Off Boot

91L04

FATO

Shipping Weight

 

175 lbs.