Navien NPE-180A2 Installation Manual page 50

Ref Description
Clearance above grade, veranda,
A
porch, deck, or balcony
Clearance to window or door
B
that may be opened
Clearance to permanently closed
C
window
Vertical clearance to ventilated
soffit located above the terminal
within a horizontal distance of
D
2 ft (61 cm) from the center line
of the terminal
Clearance to unventilated soffit
E
Clearance to outside corner
F
Clearance to inside corner
G
Clearance to each side of center
line extended above meter/
H
regulator assembly
Clearance to service regulator
I
vent outlet
Clearance to nonmechanical air
supply inlet to building or the
J
combustion air inlet to any other
appliance
50 Installing the Water Heater
Inside
corner detail
Legend:
= Vent Terminal
= Air Supply Inlet
= Area where
terminal is not permitted
Canadian installations
1
12 in. (30 cm)
36 in. (91 cm) for appliances
> 100,000 Btuh (30 kW)
12 in. (30 cm)*
3 ft (91 cm)*
3 ft (91 cm)*
2 ft (61 cm)*
12 in. (30 cm)*
3 ft (91 cm) within a height of
15 ft (4.6 m)
3 ft (91 cm)
36 in. (91 cm) for appliances
>100,000 Btuh (30 kW)
REGULATOR VENT OUTLET
In the event no regulator
is present, H and I can be
disregarded.
US installations
2
12 in. (30 cm)
4 ft (1.21 m) below or to side of
opening; 1 ft (300 mm) above
opening
12 in. (30 cm)*
3 ft (91 cm)*
3 ft (91 cm)*
2 ft (61 cm)*
12 in. (30 cm)*
3 ft (91 cm) within a height of
15 ft (4.6 m)*
3 ft (91 cm)*
4 ft (1.2 m) below or to side of
opening; 1 ft (300 mm) above
opening