Vent Pipe Termination - State Water Heaters SHE 50 76N Instruction Manual

terMInatIon clearances sIdewall power vent
D
v
L
V
Vent terminal clearances for "Power Vent" installations. Power Vent configurations use room air for combustion.
canadIan InstallatIons
Clearance above grade,
a
veranda, porch, deck or 12 inches (30 cm)
balcony
6 inches (15 cm) for appliances up to
10,000 Btu/hr (3 kW), 12 inches (30
Clearance to window
cm) for appliances between 10,000
B
or door that may be
Btu/hr (3 kW) and 100,000 Btu/hr (30
opened
kW), 36 inches (91 cm) for appliances
above 100,000 Btu/hr (30 kW)
Clearance to
c
permanently closed 12 inches (30 cm)*
window
Vertical clearance to
ventilated soffit located
above the terminal
d
within a horizontal 12 inches (30 cm)*
distance of 2 feet (61
cm) from the center line
of the terminal
Clearance to
e
12 inches (30 cm)*
unventilated soffit
Clearance to outside
f
2 feet (60 cm)*
corner
Clearance to inside
G
18 inches (45 cm)*
corner
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.
* Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's installation instructions.

vent pIpe terMInatIon

The first step is to determine where the vent pipe will terminate. See
Figures 15, 20 and 21. The vent may terminate through a sidewall as
shown in Figure 20 or through the roof as shown in Figure 21.
The vent system must terminate so that proper clearances are
maintained as cited in local codes or the current edition of the
National Fuel Gas Code, (ANSI Z223.1, 12.9.1 through 12.9.4) or the
Natural Gas and Propane Installation Code (CAN/CSA-B149.1).
(using room air for combustion)
EXTERIOR CLEARANCES FOR SIDEWALL VENT TERMINATION
E
B
v
C
F IX E D
V
C L O S E D
O P E R A B L
V
F
B
X
VENT TERMINAL AIR SUPPLY INLET
1
us InstallatIons
12 inches (30 cm)
4 feet (1.2 m) below
or to side of opening;
1 foot (30 cm) above
opening
12 inches (30 cm)*
12 inches (30 cm)*
12 inches (30 cm)*
2 feet (60 cm)*
18 inches (45 cm)*
POWER VENT
G
V
A
B
B
V
F IX E D
C L O S E D
E
O P E R A B L
V
X
E
B
V
B
J
A
AREA WHERE TERMINAL IS NOT PERMITTED
fIGure 15.
2
Clearance to each side
of center line extended
h
above meter/regulator
assembly
Clearance to service
I
regulator vent outlet
Clearance to a non
mechanical air supply
j
inlet into building or
combustion air inlet to
any other appliance
Clearance to a
K
mechanical air supply
inlet
Clearance above paved
sidewalk or paved
l
driveway located on
public property
Clearance under
M
veranda, porch, deck, or
balcony
Instructions on proper installation through a sidewall are provided
in Figure 15.
Plan the vent system layout so that proper clearances are maintained
from plumbing and wiring.
Vent pipes serving power vented appliances are classified by building
codes as "vent connectors". Required clearances from combustible
materials must be provided in accordance with information in
this manual under LOCATING THE NEW WATER HEATER and
INSTALLING THE WATER HEATER, and with the National Fuel
Gas Code and local codes.
20
H
M
X
V
K
1
canadIan InstallatIons
3 feet (91 cm) within a height 15 feet
(4.5 m) above the meter/
regulator assembly
3 feet (91 cm)
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)
6 feet (1.83 m)
7 feet (2.13 m)†
12 inches (30 cm) ‡
2
us InstallatIons
3 feet (91 cm) within a
height 15 feet (4.5 m)
above the meter/regulator
assembly*
3 feet (91 cm)*
4 feet (1.2 m) below or to
side of opening; 1 foot
(30 cm) above opening.
3 feet (91 cm) above if
within
10 feet (3 m) horizontally
7 feet (2.13 m) †
12 inches (30 cm) ‡