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TOP VIEW
Location
A
Rear Width
B
Front Width
C
Glass Opening Width
D
Glass Opening Height
E
Height-Front
F
Height-Rear
G**
Unit Depth
H
Venting Depth
Height to Top of
I
Glass Frame
* Note: If exhaust collar on insert and fi replace damper do not line up, add 4 inches (102 mm) to minimum
fi replace height for bends in vent pipe.
**Unit depth is measured to the back of the surround to give the depth needed for installation.
In addition to these dimensions, also reference Clearances and Mantel Projections (Section 5.B).
Figure 5.2 Fireplace Opening
18
Heatilator • NDI30-C, NDI30-SP, NDI35-C, NDI35-SP, NDI30-SPFK, NDI35-SPFK • 2226-901 Rev. K • 11/12
A
G
H
B
MINIMUM FIREPLACE SIZE
Inches
23-1/2
34-5/8
31-9/16
15-11/16
24
21-1/16
16
10-1/2
22
FRONT VIEW
C
E
I
NDI35-C
Millimeters
597
879
802
398
610
535
406
267
559
SIDE VIEW
D
NDI30-C
Inches
Millimeters
20-1/4
514
30-1/2
775
27-7/16
697
12-13/16
325
20-1/2
521
17-5/8
448
14-3/4
375
9-1/2
241
18-1/4
464
F
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