R Value - Enerzone SOLUTION 1.7-I Owner's Manual

3.2.2 Installation Raised of More Than 4" (102 mm)
If the extension of the masonry hearth is raised at least 4" (102 mm) from the floor protection, a non-
combustible material, without an R-value, must extend at least 16" (406 mm in USA) or 18" (457 mm
in Canada) in front of the unit (B). Refer to
3.3

R Value

There are two ways to calculate the R-value of the floor protection. First, by adding the R-values of
materials used, or by the conversion if the K factor and thickness of the floor protection are given.
To calculate the total R value from R values of the materials used, simply add the R-values of
materials. If the result is equal to or greater than the R-value requirements, the combination is
acceptable. R-values of some selected materials are shown below.
Table 2 : Thermal Characteristics of Common Floor Protection Materials
MATERIAL
Micore® 160
Micore® 300
Durock®
Hardibacker®
Hardibacker® 500
Wonderboard®
Cement mortar
Common brick
Face brick
Marble
1
Information as reported by manufacturers and other resources.
Product Specification Manual - Solution 1.7-I
"Additional Floor Protection - Raised
E
A
B
D
G
C
FLOOR PROTECTOR:
NON-COMBUSTIBLE MATERIAL
Additional Floor Protection - Raised Installation
CONDUCTIVITY (K)
PER INCH
14.3 – 20.00
F
HEARTH SLAB:
NON-COMBUSTIBLE MATERIAL
PER INCH THICKNESS
0.39
0.49
1.92
1.95
2.3
3.23
5.00
5.00
9.00
Installation".
1
RESISTANCE (R)
2.54
2.06
0.52
0.51
0.44
0.31
0.2
0.2
0.11
0.07 – 0.05
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