Monessen Hearth HVFL18 - Manual (Page 13)

59D1015 13
Measure
this
distance
Heater in
Fireplace or
Firebox
Heat
Resistant
Material
Figure 5 - Measuring Heat Resistant Material
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 REQUIREMENTS FOR SAFE INSTALLATION
MATERIAL
MEASUREMENT HVFL18 HVFL24
12" or more Hood not required. Hood not required.
8" to less than 12" Hood not required. Extend heat resistent material to 12"
or install hood. See Figure 5.
Less than 8" Extend heat resistant Extend heat resistant material to at
material to at least 8" least 8" and install hood. See Figure
and install hood. 5. OR, extend heat resistant mater-
See Figure 5. ial to a height of at least 12".
TABLE A - Heat Resistant Material Requirements with no Mantel or Combustible Projection
CLEARANCES and HEIGHT REQUIREMENTS