R
4300 ACT Wood Stove Series
FLOOR PROTECTION (Cont’d)
ALTERNATE MATERIALS WORKSHEET
How to determine if alternate floor protection materials are acceptable:
All floor protection must be
PROCEDURE:
1. Convert specification to R-value:
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| R = | 1 | x T | |
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| K x 12 | ||||
1 | x T |
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k |
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2.Determine the
i.Use the formula in step (1) to convert values not expressed as “R”.
ii.For multiple layers, add
3.If the overall
EXAMPLE: The specified floor protector should be 3/4 inch thick material with a
Step (a): Use formula above to convert specification to
| 1 | x T = | 1 | x 0.75 = 0.893 | |
R = k | .84 | ||||
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Step (b): Calculate R of proposed system.
4" brick of r = 0.2, therefore: |
| 1/8" mineral board of k = 0.29, therefore: | ||
Rbrick = 0.2 x 4 = 0.8 |
| Rmineral board = | 1 | x 0.125 = 0.431 |
| 0.29 | |||
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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.
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| Btu(ft) | 2 | o | 1 |
DEFINITIONS | R = | (ft | )(hr)( F) | k = | Btu(in) | = K x 12 | K = |
| r = (ft )(hr)( F)= |
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2 | k | ||||||||||
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| Btu |
| ft2(hr)(oF) |
| ft (hr)(oF) | (Btu)(in) |
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