Instructions / Assembly

22
D
V
V
E
FIXED
CLOSED
O
P
ERA
BL
E
O
PE
R
A
BL
E
FIXE
D
CLOSED
v
v
B
L
F
C
B
v
v
v
X
B
B
B
A
J
C
I
H
X
v
M
K
v
G
A
The following information should be used for determining the proper location of the vent terminal for
direct vent water heaters.
V
VENT TERMINAL
X
AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
HORIZONTAL VENT TERMINAL LOCATION FOR POWER VENT
Canadian Installations
1
US Installations
2
A= Clearance above grade, veranda,
porch, deck or balcony.
12 inches (30 cm) 12 inches (30 cm)
B= Clearance to window or door that may
be opened.
6 inches (15 cm) for appliances < 10,000 Btuh (3
kW), 12 inches (30 cm) for
appliances > 10,000 Btuh (3kW) and
< 100,000 Btuh (30kW), 36 inches (91 cm) for
appliances > 100,000 Btuh (30kW).
4 feet (1.2 m) below or to side of opening; 1 foot
(300 mm) above opening.
C= Clearance to permanently closed
window.
0 in (0 cm) 0 in (0 cm)
D= Vertical Clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (61 cm)
from the center line of the terminal.
12 in (30 cm) 12 in (30 cm)
E= Clearance to unventilated soffit. 12 in (30 cm) 12 in (30 cm)
F= Clearance to outside corner. 24 in (61 cm) 24 in (61 cm)
G= Clearance to inside corner. 18 in (46 cm) 18 in (46 cm)
1 In accordance with current CAN/CSA-B149.1 Installation Codes.
2 In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code.
+ A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwell-
ings and serves both dwellings.
* "Clearance in accordance with local installation codes and the requirements of the gas supplier."
H = Clearance to each side of center line
extended meter/regulator assembly.
above
3 feet (91 cm) within a height 15 feet (4.57 m) above
the meter/regulator assembly.
3 ft (91 cm) within a height of 15 ft (4.6 m)
I = Clearance to service regulator vent
outlet.
3 feet (91 cm)
3 ft (91 cm)
J = Clearance to nonmechanical air supply
inlet to building or the combustion air
inlet to any other appliance..
6 inches (15 cm) for appliances < 10,000 Btuh (3
kW), 12 inches (30 cm) for
appliances > 10,000 Btuh (3kW) and
< 100,000 Btuh (30kW), 36 inches (91 cm) for
appliances > 100,000 Btuh (30kW).
4 feet (1.2 m) below or to side of opening; 1 foot
(300 m) above opening.
K = Clearance to mechanical air supply
inlet.
6 feet (1.83 m)
3 feet (91 cm) above if within 10 feet (3 m)
horizontally.
L = Clearance above paved side walk or
paved driveway located on public
property.
7 feet (2.13 m)+ 7 feet (2.13 m)+
M = Clearance under veranda, porch, deck
or balcony.
Not Allowed Not Allowed
INSTALLATION
Power Vent Terminal Clearances