Osburn 1700-I Owner's Manual

Page 15
Product Specication Manual - Osburn 1700-I
ENGLISH
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 "Additional Floor Protection - Raised Installation".
HEARTH SLAB:
NON-COMBUSTIBLE MATERIAL
FLOOR PROTECTOR:
NON-COMBUSTIBLE MATERIAL
B
C
D
E
F
A
G
Additional Floor Protection - Raised Installation
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
1
MATERIAL CONDUCTIVITY (K)
PER INCH
RESISTANCE (R)
PER INCH THICKNESS
Micore® 160 0.39 2.54
Micore® 300 0.49 2.06
Durock® 1.92 0.52
Hardibacker® 1.95 0.51
Hardibacker® 500 2.3 0.44
Wonderboard® 3.23 0.31
Cement mortar 5.00 0.2
Common brick 5.00 0.2
Face brick 9.00 0.11
Marble 14.3 – 20.00 0.07 – 0.05
1
Information as reported by manufacturers and other resources.

Osburn 1700-I Specifications

General

Brand	Osburn
Model	1700-I
Category	Indoor Fireplace
Language	English