Gas Log Set Installation

8
NBST27 Unvented Gas Log Set
Monessen • NBST27 Gas Log Set Installation/Owner's Manual • 81D3032 • Rev A • 08/16
CLEARANCE AND HEIGHT REQUIREMENTS
Heat resistant material (minimum requirements) with
wooden mantel or other combustible projection:
To install the heater with a wooden mantel, shelf or other
combustibleprojectionabove,rstmeasuretheheatresis-
tant material shown in Figure 5, then refer to Table B.
FP2365
heat resist w/hood
8" or More of
Heat Resistant
Material
Hood
Heater in Fireplace or Firebox
Figure 5 -
Measure Heat Resistant Material for Mantel
Table B -
Heat Resistant Material Heights and Mantel Location
FP2366
mantel clear no hood
12"
Min.
28"
10" or Less
Heat Resistant
Material
Heater in
Fireplace
or Firebox
FP2366
Example:
The bottom of the mantel may project from the wall a maximum
of10"ataminimumof28"abovetherebox.
Figure 6 -
Minimum Mantel Clearance with No Hood
2 1/2"
12"
13"
24"
FP2367
mantel clearance with hood
Heat Resistant
Material
Heater in Fireplace or
Firebox
Hood
Example:
A mantel may project from the wall a maximum of 2
1
⁄2" at a min-
imum of 13" above the opening, and a maximum of 12" at a
minimum of 24" above the opening.
Figure 7 -
Minimum Mantel Clearance with Hood
Heat Resistant
Material Mea-
surement Requirements for Safe Installation
12" or more Hoodnotrequired.Observeprole
(side elevations) shown in Figure 6.
8" to less than 12" Installhoodandobserverproles
shown in Figure 7; OR extend heat
resistant material to at least 12" and
observeprolesshowninFigure 6.
Less than 8" Extend heat resistant material to at
least 8", install hood and observe pro-
lesshowninFigure 7; OR extend heat
resistant material to at least 12" and
observeprolesshowninFigure 6.