The sum of all “R” values is:

.70 + .10 + .068 + .5825 = 1.4505

This would be an acceptable combination of materials for the hearth extension since the total calculated “R” value of all material used exceed the required “R” value of 1.19.

WARNING: THE CRACK BETWEEN THE FIREPLACE AND THE HEARTH EXTENSION MUST BE SEALED WITH A NON- COMBUSTIBLE MATERIAL.

WARNING: THE FIREPLACE MUST BE RAISED IF THE HEIGHT OF THE HEARTH EXTENSION EXCEEDS 8 ¹⁄₂" ABOVE THE BOTTOM OF THE FIREPLACE (FIGURE

46).

8 ¹⁄₂" Max.

Maximum Thickness of Hearth Extension when EST-48 is on the Floor

Figure 46

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 47.

Combustible

Materials AllowedFireplace

in Shaded Areas

3¹⁄₄"

¹⁄₂"

4 ³⁄₄"

15°

12" Min. Distance to Protected Side Wall

18" Min. Distance to Unprotected Side Wall

Figure 47

INSTALLATION COMPONENTS

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

Outside Combustion Air Kits

 

(with duct)

81L87

FOAK

(without duct)

81L88

FOAK-LD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Combination

 

 

Offset/Return Elbow

63L35

FTF13-OR15

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Firestop Spacer (30° )

63L37

F10FS30-2

 

 

 

Offset/ Return

 

 

Package (30° )

63L24

FTF13-ES30

Chase Termination

 

 

(Square)

63L54

FTF13-CT2

Stabilizer

63L27

FTF13-S4

Locking Band

63L60

FLB

17