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

•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.

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

12in.

(305 mm)

42 in.

(1067 mm)

66 in.

(1676 mm)

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

12in.

(305 mm)

Raised Platform

20 in. (508 mm) Minimum

Flush Hearth

30 in. (762 mm) Minimum

Table 12.2

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)

Heat & Glo • RUTHERFORD-42 • 4059-309 Rev G • 11/08

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Hearth and Home Technologies RUTHERFORD-42 owner manual Finishing, Hearth Extension, = 1/k x inches of thickness
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RUTHERFORD-42 specifications

Hearth and Home Technologies presents the RUTHERFORD-42, an exceptional gas fireplace that combines sophisticated design with advanced functionality. This model signifies the perfect blend of aesthetics and performance, making it a favored choice for homeowners seeking to enhance their living spaces with the warmth and comfort of a fireplace.

One of the primary features of the RUTHERFORD-42 is its impressive viewing area, measuring 42 inches wide. This expansive glassfront design offers a stunning visual display of the flames, creating a cozy ambiance that enhances any room. The fireplace is framed with a stylish surround that can be customized to match various interior styles, adding a touch of elegance to contemporary and traditional homes alike.

Equipped with advanced technology, the RUTHERFORD-42 ensures efficient heat output while maintaining ease of use. The fireplace features an electronic ignition system that provides reliability and convenience with a simple push-button start. Additionally, it incorporates a thermostat remote control, allowing users to easily regulate the temperature from anywhere in the room. This functionality not only enhances user comfort but also improves energy efficiency.

The unit is designed with a powerful yet quiet fan that circulates warm air throughout the space, ensuring even heat distribution. This makes the RUTHERFORD-42 an excellent option for supplemental heating in larger rooms, providing both style and warmth during colder months.

Safety is a paramount concern in all Hearth and Home Technologies products, and the RUTHERFORD-42 is no exception. It includes safety screens that protect against accidental contact with the flames, ensuring peace of mind while enjoying the fire’s warmth. Furthermore, it complies with stringent safety standards, making it a reliable choice for families.

In terms of aesthetics, the RUTHERFORD-42 offers various media options, including glass, ceramic logs, and stone, allowing homeowners to personalize the fire's appearance to align with their home’s décor. The fireplace is also available in different finishes, giving users the flexibility to create a focal point that perfectly complements their interior design.

Overall, the Hearth and Home Technologies RUTHERFORD-42 is a standout model that combines cutting-edge technology, safety features, and design flexibility, making it an excellent choice for anyone looking to add a stylish and functional gas fireplace to their home.
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