29
Appendix
XG0231 - 061120
PVVEX510-300 Power Vent Locations
v
v
FIXE
D
CLO
SED
OPE
RAB
LE
F
C
B
v
v
OPE
RAB
LE
FIXE
D
CLO
SED
v
B
X
B
A
B
J
H
I
X
K
v
M
V
B
L
D
E
V
INSI
DE
CORNE
R DE
TAIL
v
G
A
V
VENTER TERMINAL
X
AIR SUPPLY INLET
AREA WHERE TERMINAL IS
NOT PERMITTED
PVVEX58-300
A= Clearance above grade, veranda,
porch, deck, or balcony
12 in (30 cm)
12 in (30 cm)
Canadian Installations
US Installations
1
2
B= Clearance to window or door that
may be opened
6 in (15 cm) for appliances <
10,000 Btuh (3 kW), 12 in
(30 cm) for appliances >
10,000 Btuh (3 kW) and <
100,000 Btuh (30 kW), 36 in
(91 cm) for appliances >
100,000 Btuh (30 kW)
6 in (15 cm) for appliances <
10,000 Btuh (3 kW), 9 in
(23 cm) for appliances >
10,000 Btuh (3 kW) and <
50,000 Btuh (15 kW), 12 in
(30 cm) for appliances >
50,000 Btuh (15 kW)
C= Clearance to permently closed
window
B
B
N/A
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
N/A
E= Clearance to unventilated soffit
*
*
F= Clearance to outside corner
*
*
G= Clearance to inside corner
*
*
H= Clearance to each side of center
line extended above meter/regulator
assembly
3 ft (91 cm) within a height 15
ft. (4.5 m) above the meter/
regulator assembly
*
I= Clearance to service regulator
vent outlet
3 ft (91 cm)
*
J= Clearance to nonmechanical air
supply inlet to building or the
combustion air inlet to any other
appliance
6in (15 cm) for appliances <
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000
Btuh (3 kW) and < 100,000
Btuh (30 kW), 36 in (91 cm)
for appliances > 100,000
Btuh (30 kW)
Canadian Installations
US Installations
1
2
6in (15 cm) for appliances <
10,000 Btuh (3 kW), 9 in (23
cm) for appliances > 10,000
Btuh (3 kW) and < 50,000
Btuh (15 kW), 12 in (30 cm)
for appliances > 50,000 Btuh
(15 kW)
K= Clearance to a mechanical air
supply inlet
6 ft (1.83 m)
3 ft (91 cm) above if within 10
ft (3 m) horizontally
L= Clearance above paved sidewalk
or paved driveway located on
public property
7 ft (2.13 m)
*
M= Clearance under veranda porch
deck, or balcony
12 in (30 cm)
*
1 In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code
2 In accordance with the 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 dwellings and serves both dwellings.
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath
the floor.
* For clearances not specified in ANSI Z223.1/NFPA or CSA B149.1, one of the following shall be
indicated
a) A minimum clearance value determined by testing in accordance with section 2.23.5, or;
b) A reference to the following footnote:
"Clearance in accordance with local installation codes and the requirements of the gas supplier"
