Clearances And Height Requirements - Monessen Hearth MJ27NR Installation And Operating Instructions Manual

CLEARANCES and HEIGHT REQUIREMENTS

Heat resistant material (minimum requirements) with no wooden mantel or other combustible projection:
To install the gas logs into a fireplace with no wooden mantel, shelf or other combustible projection above the
fireplace opening, measure the heat resistant material height, per Figure 5, then see TABLE A.
Heat resistant materials such as slate and marble must be at least 1/2" thick. Sheet metal should not be
installed onto combustible material.
IMPORTANT: If you cannot meet these minimum clearances you must operate the heater with chimney flue
damper open. Refer to "Installing Vented Applications" found on Page 18.
Heat Resistant
Measurement
12" or more
8" to less than 12"
Less than 8"
TABLE A - Heat Resistant Material Requirements with no Mantel or Combustible Projection
12
Heat Resistant
Material
Figure 5 - Measuring Heat Resistant Material
Material
Hood not required
Extend heat resistant material to 12" OR install hood.
Refer to Figure 5
Extend heat resistant material to 8" AND install hood.
Refer to Figure 5. OR, extend heat resistant material
to a height of at least 12"
Measure
This
Distance
Heater in Fireplace
or Firebox
FP1997
FP1997
heat resistant material
Requirements for Safe Installation
MJ27
86D0024