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Hearth and Home Technologies 820-0721 Floor Protection Cont’d, Alternate Materials Worksheet

Models: 820-0721

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5700 ACT Wood Stove

R

FLOOR PROTECTION (Cont’d)

ALTERNATE MATERIALS WORKSHEET

How to determine if alternate floor protection materials are acceptable:

All floor protection must be non-combustible (i.e., metals, brick, stone, mineral fiber boards, etc.). Any organic materials (i.e., plastics, wood paper products, etc.) are combustible and must not be used. The floor protection specified includes some form of thermal designation such as R-value (thermal resistance) or k-factor (thermal conductivity).

PROCEDURE:

1. Convert specification to R-value:

R-value given - no conversion needed.

 

 

K-factor is given with a required thickness (T) in inches:

r =

1

x T

 

 

K x 12

k-factor is given with a required thickness (T) in inches: r =

1

x T

r-factor is given with a required thickness (T) in inches: R = r x T

 

 

k

 

 

 

 

 

 

 

 

2.Determine the R-value of the proposed alternate floor protector.

i.Use the formula in step (1) to convert values not expressed as “R”.

ii.For multiple layers, add R-values of each layer to determine overall R-value.

3.If the overall R-value of the system is greater than the R-value of the specified floor protector, the alternate is acceptable.

EXAMPLE: The specified floor protector should be 3/4 inch thick material with a k-factor of 0.84. The proposed alternate is 4” brick with an r-factor of 0.2 over 1/8” mineral board with a k-factor of 0.29.

Step (a): Use formula above to convert specification to R-value.

 

1

 

1

x 0.75 = 0.893

r = k x T =

.84

 

Step (b): Calculate R of proposed system.

4" brick of r = 0.2, therefore: rbrick = 0.2 x 4 = 0.8

1/8" mineral board of k = 0.29, therefore:

rmineral board = 1 x 0.125 = 0.431

0.29

rtotal = rbrick + rmineral board = 0.8 + 0.431 = 1.231

Step (c): Compare proposed system Rtotal of 1.231 to specified R of 0.893. Since proposed system Rtotal is greater than required, the system is acceptable.

 

 

(ft2)(hr)(oF)

k =

btu(in)

= K x 12

 

btu(ft)

r = (ft2)(hr)(oF)

1

 

 

 

 

 

 

 

 

 

DEFINITIONS

r =

btu

 

ft2(hr)(oF)

K =

ft2(hr)(oF)

(btu)(in) =

k

Page

250-7090E

September 1, 2008

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Hearth and Home Technologies 820-0721 warranty Floor Protection Cont’d, Alternate Materials Worksheet
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820-0721 specifications

Hearth and Home Technologies (HHT) 820-0721 is a premium fireplace and heating solution that exemplifies modern design and innovative technology. Designed for comfort and efficiency, the 820-0721 model brings together aesthetic appeal and advanced functionality, making it an ideal choice for homeowners seeking to enhance their living spaces.

One of the key features of the HHT 820-0721 is its advanced heating capabilities. Utilizing cutting-edge technology, this fireplace delivers impressive heating performance while maintaining energy efficiency. The model is engineered to provide consistent warmth, ensuring that any room remains cozy even during the coldest months of the year. With its ability to efficiently convert fuel into heat, users can enjoy optimal warmth while minimizing energy costs.

Additionally, the HHT 820-0721 incorporates a range of customization options. Homeowners can choose from a variety of styles, finishes, and sizes, allowing them to tailor the fireplace to their specific decor preferences. The sleek and modern design complements a wide array of interiors, from traditional to contemporary, making it a versatile addition to any home.

The technology behind the HHT 820-0721 is also noteworthy. Equipped with advanced safety features, this fireplace includes an automated shut-off system that ensures safe operation. The unit is designed to prevent overheating and includes protective screens that mitigate the risk of accidental burns. These safety enhancements provide peace of mind for families who prioritize both style and security.

The HHT 820-0721 is also user-friendly, featuring intuitive controls that make it easy to adjust temperature settings. Moreover, many models come with remote control options, allowing users to operate their fireplace from anywhere in the room. This convenience adds to the overall appeal of the unit, making it simple to create the perfect ambiance without the hassle of manual adjustments.

In summary, the Hearth and Home Technologies 820-0721 is a premium fireplace solution that excels in heating efficiency, design flexibility, and safety features. Its modern aesthetics, combined with advanced technology and ease of use, make it an outstanding choice for those looking to enhance their home's comfort and visual appeal. As homeowners continue to seek innovative heating solutions, the HHT 820-0721 stands out as a leader in the market.