Monessen Hearth NBST27NV-B Installation & Owner's Manual page 11

The gas log heater must be installed at least 3/4" above
any combustible flooring material, such as carpeting or
tile, which is closer than 14" to the base of the fireplace.
The minimum distance must be maintained from the top
surface of carpeting, tile, etc. Figure 3.6.
OR
The gas log heater may be installed nearer to the floor if a
minimum of 14" of noncombustible material such as slate
or marble is installed between the base of the fireplace and
the combustible flooring. Figure 3.7
Figure 3.6 - Minimum Clearance above Combustible Floor-
ing
Figure 3.7 - Minimum Clearance above Combustible
Flooring with Noncombustible Material Installed at Base
of Fireplace
FP2369
comb floor
Monessen • NBST27-B Gas Log Set Owner's /Installation Manual • 4615-900 Rev. D • 01/2020
Heater in Fireplace
or Firebox
Combustible
Material
3/4"
Heater in Fireplace
or Firebox
Combustible
Material
This distance may now
be less than 3/4"
14" Min.
11