Termination Clearances Sidewall Direct Vent - State Water Heaters 301 Series Instruction Manual

TERMINATION CLEARANCES SIDEWALL DIRECT VENT

D
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Vent terminal clearances for "Direct Vent" installations. Direct Vent configurations use outdoor air for combustion.
Type of Clearance Canadian Installations 1
Clearance above
A
grade, veranda, porch, 12 inches (30 cm)
deck or balcony
• 6 in (15 cm) for appli-
ances ≤ 10,000 Btuh
(3 kW)
• 12 in (30 cm) for appli-
Clearance to window
ances > 10,000 Btuh
B
or door that may be
(3 kW) and ≤ 100,000
opened
Btuh
• (30 kW), 36 in (91
cm) for appliances
>100,000 Btuh (30 kW)
Clearance to perma-
C
6 inches (15 cm)*
nently closed window
Vertical clearance to
ventilated soffit locat-
ed 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 unventi-
E
12 inches (30 cm)*
lated 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.
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.
E
B
C
F
B
Figure 52. Direct Vent Using Outside Air
US Installations
12 inches (30 cm)
• 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)
6 inches (15 cm)*
12 inches (30 cm)*
12 inches (30 cm)*
2 feet (60 cm)*
18 inches (45 cm)*
G
H
H
B
B
B
I
B
J
2
Type of Clearance
Canadian Installations
Clearance to each side Clearance in accordance
of center line extended with local installation
H
above meter/regulator codes and the require-
assembly ments of the gas supplier.
Above a regulator, within
3 ft (91 cm) horizontally
Clearance to service of the vertical center line
I
regulator vent outlet of the regulator vent out-
let, to a maximum vertical
distance of 15 ft (4.5 m)
•
Clearance to a non
•
mechanical air supply
J
inlet into building or
combustion air inlet to
any other appliance
•
Clearance to a me-
K
6 feet (1.83 m)
chanical air supply inlet
Clearance above paved
sidewalk or paved drive-
L
7 feet (2.13 m)†
way located on public
property
Clearance under
M
veranda, porch, deck, 12 inches (30 cm) ‡
or balcony
38
M
K
1
US Installations
Clearance in accordance
with local installation codes
and the requirements of the
gas supplier.
Clearance in accordance
with local installation codes
and the requirements of the
gas supplier
6 in (15 cm) for appli- • 6 in (15 cm) for appli-
ances ≤ 10,000 Btuh ances ≤ 10,000 Btuh
(3 kW) (3 kW)
12 in (30 cm) for appli- • 9 in (23 cm) for appli-
ances > 10,000 Btuh ances > 10,000 Btuh (3
(3 kW) and ≤ 100,000 kW) and ≤ 50,000 Btuh
Btuh (30 kW) (15 kW)
36 in (91 cm) for appli- • 12 in (30 cm) for appli-
ances >100,000 Btuh ances > 50,000 Btuh
(30 kW) (15 kW)
3 feet (91 cm) above if
within 10 feet (3 m) hori-
zontally
7 feet (2.13 m)†*
12 inches (30 cm) ‡*
2