12 Finishing

A. Non-Combustible Materials

Materials which will not ignite and burn, composed of any combination of the following:

-

Steel

-

Iron

-

Brick

-

Tile

-

Concrete

-

Slate

-

Glass

-

Plasters

Materials reported as passing ASTM E 136, Standard

Test Method for Behavior of Metals, in a Vertical Tube Furnace at 750° C

B. Combustible Materials

Materials made of or surfaced with any of the following materials:

-

Wood

-

Compressed paper

-

Plant fibers

-

Plastic

Any material that can ignite and burn; flame proofed or not, plastered or un-plastered

C. Hearth Extension

WARNING! Risk of fire! High temperatures, sparks, em- bers or other burning material falling from the fireplace may ignite flooring or concealed combustible surfaces.

Metal hearth strips MUST be installed (Section 7.C.).

Hearth extensions MUST be installed exactly as specified.

Table 12.1

R = 1/k x inches of thickness

Table 12.2

You MUST use a hearth extension with this fireplace.

This fireplace has been tested and approved for use with a hearth extension insulated to a minimum R value of 2.32.

The hearth extension material MUST be covered with tile, stone or other non-combustible material.

Manufactured hearth materials will usually have a published R value (resistance to heat) or k value (conductivity of heat). Refer to the formula in Table 12.1 to convert a k value to an R value,

Refer to Table 12.2 for hearth extension insulation alternatives.

12in.

(305 mm)

50 in.

12 in.

(1270 mm)

(305 mm)

 

74 in.

(1880 mm)

(R value of hearth must be equal to or greater than 2.32)

Figure 12.1 Hearth Extension Dimensions

Hearth Extension Insulation Alternatives-Total minimum R Value must equal 2.32

 

k per inch

R per inch

 

Material

thick

thick

Minimum thickness required

Hearth & Home HX3, HX4 (Micore 300™)

0.49

2.06

1 in. (25.4 mm)

 

 

 

 

USG Micore 160™

0.39

2.54

1 in.(25.4 mm)

 

 

 

 

USG Durock™ Cement Board

1.92

0.52

4 in. (101.6 mm)

Cement Mortar

5.0

0.20

10 in. (254 mm)

 

 

 

 

Common Brick

5.0

0.20

10 in. (254 mm)

Ceramic Tile

12.50

0.08

25-3/4 in. (654 mm)

 

 

 

 

Armstrong™ Privacy Guard Plus

0.46

2.18

1 in. (25.4 mm)

Marble

14.3 to 20.0

0.07 to 0.05

29-1/2 to 41 in. (749.3 to 1041.4 mm)

38

Heat & Glo • RUTHERFORD-504059-333 Rev C • 06/08

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Heat & Glo LifeStyle 50 owner manual Finishing, Hearth Extension, = 1/k x inches of thickness

50 specifications

The Heat & Glo LifeStyle 50 is a contemporary gas fireplace that embodies a perfect blend of modern aesthetics and cutting-edge technology. Designed for those who seek elegance and functionality, this fireplace is ideal for both new constructions and renovations, making it a versatile choice for any home.

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