HEI150 Wood Insert Fireplace Installation and Operation Manual
33
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 insert can extend at most 5 1/8" (130 mm) in the room (see illustrations below). The
insert can be moved back this much or to any position in between as long as the openings on
each sides of the insert (A) are always in front of the faceplate. The position chosen will
depend on your own preference for most installations, your current configuration, the
compliance with the preceding installation instructions and compliance with the building code
requirements. To determine the minimum and maximum projection of the insert, refer to table
Data for floor protection calculation.