John Wood Envirosense Power Direct Vent (May 2010 or later) - Manuel (Page 28)

28
TERMINATION CLEARANCES SIDEWALL POWER VENT
V X
VENT TERMINAL AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
v
v
A
G
V
FIXED
CLOSED
FIXED
CLOSED
OPERABLE
OPERABLE V
C B
B
B
B
F
B
V
V
A
J
V
H
M
X
X
V
V
K
B
E
D
L
POWER VENT
(using room air for combustion)
EXTERIOR CLEARANCES FOR SIDEWALL VENT TERMINATION
Figure: 15
Vent terminal clearances for “Power Vent” installations. Power Vent configurations use room air for combustion.
CANADIAN INSTALLATIONS 1 CANADIAN INSTALLATIONS 1
A
Clearance above grade,
veranda, porch, deck or
balcony
12 inches (30 cm)
H
Clearance to each side
of center line extended
above meter/regulator
assembly
3 feet (91 cm) within a height 15 feet
(4.5 m) above the meter/
regulator assembly
B
Clearance to window
or door that may be
opened
6 inches (15 cm) for appliances up to
10,000 Btu/hr (3 kW), 12 inches (30
cm) for appliances between 10,000
Btu/hr (3 kW) and 100,000 Btu/hr (30
kW), 36 inches (91 cm) for appliances
above 100,000 Btu/hr (30 kW)
I
Clearance to service
regulator vent outlet 3 feet (91 cm)
C
Clearance to
permanently closed
window
12 inches (30 cm)*
J
Clearance to a non
mechanical air supply
inlet into building or
combustion air inlet to
any other appliance
6 inches (15 cm) for appliances up
to 10,000 Btu/hr (3 kW), 12 inches
(30 cm) for appliances between
10,000 Btu/hr (3 kW) and 100,000
Btu/hr (30kW), 36 inches (91cm)
for appliances above 100,000 Btu/
hr (30 kW)
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 inches (30 cm)*
K
Clearance to a
mechanical air supply
inlet
6 feet (1.83 m)
E Clearance to
unventilated soffit
12 inches (30 cm)*
L
Clearance above paved
sidewalk or paved
driveway located on
public property
7 feet (2.13 m)†
F Clearance to outside
corner
2 feet (60 cm)*
M
Clearance under
veranda, porch, deck, or
balcony
12 inches (30 cm) ‡
G Clearance to inside
corner
18 inches (45 cm)*
1 In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.
† A vent shall not terminate where it may cause hazardous frost or ice accumulations on adjacent property surfaces.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer’s installation instructions.