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Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15
10
D
Clearance to Ceiling
30 in. (762 mm)
0 in.
0 in. to level
of standoffs
Combustible Object
36 in.
(914 mm)
0 in.
Combustible flooring may be installed next
to the front of the appliance.
Drywall
1/2 in.
(13 mm)
1/2 in.
(13 mm)
C
A
B
Model
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
NNXT3933
39
991
34 7/8
886
19 5/8
498
10
254
9
229
NNXT4236
42
1067
34 7/8
886
19 5/8
498
10
254
9
229
D
Rough Opening
(SLP Pipe)
A
Rough Opening
(Width)
B
Rough Opening
(Height)
D
Rough Opening
(DVP Pipe)
C
Rough Opening
(Depth)
Figure 3.3 Clearances to Combustibles
Note:
If the inside of the framed cavity is to be
fi
nished,
the framing dimensions
must
include the finished
surface. If drywall is to be attached to the rear wall,
the depth must be measured from the drywall surface.