Osburn MATRIX - Page 38

Matrix Insert Installation and Operation Manual
38 ______________________________________________________________________________
Thermal Characteristics of Common Floor Protection Materials*
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
Ceramic tile
12.5
0.008
Concrete
1.050
0.950
Mineral wool insulation
0.320
3.120
Limestone
6.5
0.153
Ceramic board (Fibremax) 0.450 2.2
Horizontal still air** (1/8")
0.135
0,920**
* Information as reported by manufacturers and other resources
** For a 1/8" thickness. You cannot «stack» horizontal still air to accumulate R-values; you must separate each layer of
horizontal still air with another non-combustible material.
The standard configuration of the insert leaves no projection of the convection air jacket in front
of the fireplace opening. Therefore the minimum projection is 0''. Although it is possible to
position the insert to obtain a projection of 2'' (51 mm) or 4'' (102 mm) of the convection air jacket
in front of the fireplace opening with the use of the “PROJECTION KIT” option AC01323. The choice
of the configuration will depend on, the previous installation instructions and compliance with
building code. To determine the minimum and maximum projection of the insert, refer to table
Data for floor protection calculation.