5 Framing and Clearances
A. Select Appliance Location
When selecting a location for the appliance it is important to consider the required clearances to walls (see Figure 5.1).
WARNING! Risk of Fire or Burns! Provide adequate clearance around air openings and for service access. Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.
NOTICE: Illustrations reflect typical installations and are FOR DESIGN PURPOSES ONLY. Illustrations/diagrams are not drawn to scale. Actual installation may vary due to individual design preference.
1/2 in. (13 mm) 
min. appliance
to combustibles
| D | 1 in. (25 mm) |
| min. pipe to | |
|
| |
B | 1/2 in. (13 mm) min. | combustibles |
C | appliance to |
|
| combustibles |
|
B
Drywall
A
Top Vent
One 90° elbow
Horiz Term
A
G
Alcove
Installation
48 in.
(1219 mm)
maximum
AD
Rear vent
One 45° elbow Horiz Term
In addition to these framing dimensions, also reference the following sections:
•Clearances and Mantel Projections (Sections 3.C. and 3.D.)
•Vent Clearances and Framing (Section 6)
Rear Vent
One 90° elbow
A Vert Term
E
1 in. (25 mm) |
|
min. pipe to | E |
combustibles |
No elbows
Horiz Term
A
Rear Vent |
|
Two 90° elbows | A |
Horiz Term |
F
C
F
Model |
| A | B | C | D | E | F | G | |
NNXT3933 | in. | 39 | 47 | 40 | |||||
mm | 991 | 902 | 498 | 1102 | 1194 | 1353 | 1016 | ||
| |||||||||
NNXT4236 | in. | 42 | 47 | 43 | |||||
mm | 1067 | 956 | 498 | 1102 | 1194 | 1353 | 1092 | ||
|
Figure 5.1 Appliance Locations
18 | Heatilator • Novus NNXT • |