Monessen • Mojo Installation/Owner’s Manual • 4623-900 Rev. D • 04/21
10
Non-combustible material (minimum requirements)
with wooden mantel or other combustible projection:
To install the heater with a wooden mantel, shelf or other
combustible projection above, first measure the non-com
-
bustible material shown in
Figure 3.3,
then refer to Table B.
FP2255
measure heat resist
Hood
Heater in Fireplace
or Firebox
8" or More
of Non-
combustible
Material
Figure 3.3 - Measuring Non-combustible Material for Mantel
Table B - Non-Combustible Material Requirements Height and Mantel Location
Non-Combustible
Material
Measurement
Requirements for Safe Installation with Wooden Mantel, Shelf or other Combustible
Projection
MJ22
MJ27
12" or more
Hood not required. Observe profiles (side
elevations) shown in
Figure 3.6
.
Hood not required. Observe profile (side
elevations shown in Figure 3.6 .
8" or less than 12"
Install hood and observe profiles shown
in
Figure 3.5
OR
Extend non-combustible
material to at least 12" and observe profiles
shown in
Figure 3.4.
Install hood and observe profiles shown in
Figure 3.5
.
OR
Extend non-combustible
material to at least 12" and observe profiles
shown in
Figure 3.6
.
Less than 8"
Extend non-combustible to at least 8", install
hood and observe profiles shown in
Figure
3.5
.
OR
Extend non-combustible material
to at least 12" and observe profiles shown in
Figure 3.4
.
Extend non-combustible material to least
8", install hood and observe profiles shown
in
Figure 3.5
.
OR
Extend non-combustible
material to at least 12" and observe profiles
shown in
Figure 3.6
.