Vermont Casting SHR42A Side Wall Protection, Example of Determining Hearth Extension Equivalents

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Side Wall Protection

Adjacent combustible side walls that are within dimen- sions shown in Figure 29 of fireplace opening must be protected with Wall Shield Model SP40 or a specifically built wall shield described in Figure 28.

The special wall shield design described in Figure 26 is an alternate method of adding protection to side walls and can be used in place of the SP40 with the same wall clearances specified for the SP40. Rt must =1.85 minimum.

Examples of wall shield insulation:

1.Manville - CERAFORM 126, K=.27, 1/2 inches thick

2.CFM Corporation - EH2416, K = .458, 1 inch thick required.

40"

Min.

SHR Series Woodburning Fireplaces

The top of insulation must be covered with a noncom- bustible decorative covering or a piece of .018” mini- mum sheet metal, to protect hearth extension material. (Fig. 31)

Secure the hearth extension to the floor to prevent shifting, using trim molding or other similar means at three (3) outer edges. Seal crack between the fireplace hearth and hearth extension with a noncombustible material. (Figs. 31-34)

WARNING: HEARTH EXTENSION MUST BE IN- STALLED IN ACCORDANCE WITH FIGURE 26.

Alternate noncombustible materials may be used pro- viding the (total) thermal resistance (Rt value) of the al- ternate material employed is greater than or equal to R

=1.09. Thermal resistance (R) or thermal conductivity (K), may be obtained from manufacturer of the material. Factors are related by the formula K = 1/R. (Fig. 30)

T = given thickness

R = thermal resistance for a given thickness (T) K = thermal conductivity

Noncombustible material with a lower R value may be used, provided thickness of material is sufficiently greater to maintain an equivalent (total) thermal resis- tance (Rt).

Decorative Non- combustible Rigid Covering

FP838

40" Min.

Noncombustible Insula- tion

RT = 1.85 Min. (Manville Ceraform 126

-1/2" Thick or CFM Corporation EH2416 - 1" Thick)

Example of Determining

Hearth Extension Equivalents

To determine the thickness required for any new mate- rial:

NEW

 

K of new material (per inch)

thickness

required

=

 

 

X of listed

 

 

thickness

 

K of listed material (per inch)

material

Example for Common Brick

T (new) = 5.0/0.458 x 0.50 in. = 5.46 in. (new required thickness).

Fig. 29 Noncombustible wall shield dimensions.

Hearth Installation

A hearth extension is required to protect a combustible floor in front of the fireplace. Refer to Figure 29 for minimum dimensions and mounting detail.

NOTE: Hearth Extension must not cover the air inlet opening of a fireplace.

The hearth extension described in Figure 31 must be a durable noncombustible material with a minimum (total) Rt value of 1.09; refer to Figure 30 for examples. The overall height (above a combustible floor), depth and width must be as indicated, with the extension centered to the fireplace opening.

Common Materials And Factors

Material

K*

R

Minimum

Thickness

 

 

 

EH2416

1.09

0.50 in.**

 

����������������� 0.458

 

 

 

 

 

Common Brick 5.0

0.10

5.46 in.**

 

R Value is for ��� inch.

*Units of K = BTU/SQ FT/HR/˚F/IN ** Thickness of Listed Material

FP533ADD

Fig. 30 Hearth extension material factors.

20001384

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Contents SHR Series Table of Contents Safety InformationSHR36 Series Woodburning Fireplace SHR48 Series Woodburning Fireplace Chase Installation 30˚ Elbow Offsets Chimney Requirements Offset InstallationsMounting the Fireplace Planning InformationPlanning the Chimney Run Ten Foot RuleChase Installation InstallationChimney Supports Insulating Fireplace Enclosure for Cold ClimatesChimney Set-up Firebrick InstallationFraming Offset Installation Straight-Up Chimney InstallationCeiling Chimney Hole Possible Obstructions Cutting the HoleInstalling Outside Air Kit Positioning, Safety Strips Securing the FireplaceProper Firestop Spacer Installation Installing the Chimney SystemInstalling the Firestop Spacer Ceiling Hole Installing Top Housing or Termination Install Remainder of Chimney SectionsAdditional Ceilings Penetrating the RoofFinish Wall Installing Chimney in a ChaseFinishing Mantel clearance Facing on fireplace surround flush with finished wall Side Wall Protection Hearth InstallationExample of Determining Hearth Extension Equivalents Example for Common BrickMinimum Wall Clearances Sealing detail Installing Line for Gas LogsSHR36/42A/48/52 Woodburning Fireplace Accessory Description Model No AccessoriesSLTCF11 Limited Warranty & 30 Year Protection Plan CFM Corporation

SHR36, SHR42A, SHR48, SHR52 specifications

Vermont Casting gas fireplaces, including the SHR42A, SHR36, SHR48, and SHR52 models, stand out for their construction quality and innovative technologies. These models are designed to provide not only warmth but also aesthetic appeal, making them an attractive addition to any home.

The SHR series features a variety of sizes to accommodate different spaces, with the SHR36 being the smallest at 36 inches, while the SHR52 is the largest with a 52-inch dimension. These options allow homeowners to choose a model that best fits their room size and heating needs. Each unit prides itself on powerful heating capabilities, efficiently distributing warmth through advanced heat exchanger systems.

One of the standout features of these fireplaces is their use of high-quality cast iron construction. This material not only adds durability but also enhances the fireplace’s ability to retain and radiate heat. As a result, users experience effective and consistent heating, ensuring comfort during colder months.

The Vermont Casting SHR models incorporate state-of-the-art gas burning technology, including dual-flame ports and easy-adjust controls. This technology allows for precise flame adjustment, enabling users to set the ambiance they desire. Additionally, the fireplace's realistic flame presentation creates a cozy atmosphere reminiscent of traditional wood-burning fires.

Another significant characteristic of the SHR series is the option for customization. Homeowners can choose from various decorative front options, styles, and finishes, allowing for a tailored look that blends seamlessly with their existing décor. The cast iron grates and multiple log options enhance the realistic appearance of the fireplace, making it a striking focal point in any room.

Safety features are integral to the design of these fireplaces. With a sealed combustion system, the SHR models ensure that gases are safely vented outside, minimizing the risk of indoor air pollution. The glass doors are tempered, offering extra protection while still allowing for an unobstructed view of the flames.

In terms of efficiency, the SHR series is designed with energy-saving technologies that maximize heat output while minimizing gas consumption. This efficiency not only lowers utility costs but also makes these fireplaces a more environmentally conscious heating option.

In summary, the Vermont Casting SHR42A, SHR36, SHR48, and SHR52 gas fireplaces offer a unique combination of elegance, efficiency, and exceptional heating capabilities. Their durable construction, advanced technology, and customizable features make them a choice that enhances both comfort and style for any home.