
49
Heatilator • NNXT33-IFT, NNXT33L-IFT, NNXT36-IFT, NNXT36L-IFT Installation Manual • 2628-980 Rev. C • 8/20
10
10
Finishing
B. Mantel and Wall Projections
WARNING! Risk of Fire!
Comply with all minimum clear-
ances to combustibles as specified. Framing or finishing
material closer than the minimums listed must be construct
-
ed entirely of non-combustible materials (i.e., steel studs,
concrete board, etc).
Measured from top of hood or top of appliance opening (in inches)
Refer to Section 3 for additional clearances to combustibles information.
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
5
5-1/2
6-1/4
7
7-3/4
8-1/2
9-1/4
10
10-3/4
11-1/2
12-1/4
13
13-3/4
14-1/2
15-1/4
16
30 in. minimum
to ceiling
Figure 10.1
Minimum Vertical and Maximum Horizontal
Dimensions
Note:
All
measurements
in inches
.
Figure 10.2 Mantel Leg or Wall Projections (Acceptable on both
sides of opening)
Combustible Mantels
Combustible Mantel Legs or Wall Projections
Note:
Mantel measurement is taken from top of the
opening, NOT the top of the fireplace.
MANTEL LEG OR
PERPENDICULAR WALL
TOP OF
APPLIANCE
DRYWALL
FIREPLACE
OPENING
See Dimension B on
Appliance Dimension
Diagram.
UNLIMITED
STOP FINISHING MATERIAL
FLUSH WITH OUTSIDE EDGE
OF APPLIANCE.
1 in. (max)
1 in.
(min)
3-1/2 in.
(min)
NOTICE:
Surface temperatures around the appliance will
become warm while the appliance is in operation. Ensure
finishing materials used for all surfaces (floor, walls,
mantels, etc.) will withstand temperatures up to 190
°
F.
Risk of Fire!
DO NOT
apply combustible materials beyond the min-
imum clearances.
Comply with all minimum clearanc-
es to combustibles as specified in this manual.
Ma
-
terials overlapping into non-combustible zones could
ignite and will interfere with air flow through decorative
barrier fronts.
• Metal front of appliance may be covered with non-
combustible materials only.
• Facing and/or finishing materials must not interfere
with air flow through
decorative barrier fronts, removal
of decorative barrier fronts or access for service.
• Facing and/or finishing materials must never
overhang into the glass opening.
• Observe all clearances when applying combustible
materials.
• Seal gaps between the finished wall and appliance
top and sides using a 300 ºF minimum sealant.
WARNING
A. Facing Material