Termination Clearances Sidewall Power Vent - A.O. Smith 100 Series Installation And Operating Manual

TERMINATION CLEARANCES SIDEWALL POWER VENT

D
Table 8. Termination Clearances for Sidewall Power Vent
Type of Clearance
Canadian Installations
A Clearance above 12 inches (30 cm)
grade, veranda,
porch, deck or
balcony
B Clearance to • 6 in (15 cm) for appli-
window or door that ances ≤ 10,000 Btuh
may be opened (3 kW)
• 12 in (30 cm) for appli-
ances > 10,000 Btuh
(3 kW) and ≤ 100,000
Btuh (30 kW),
• 36 in (91 cm) for appli-
ances > 100,000 Btuh
(30 kW)
C Clearance to 12 inches (30 cm)*
permanently closed
window
D Vertical clearance 12 inches (30 cm)*
to ventilated soffit
located above the
terminal within a
horizontal distance
of 2 feet (61 cm)
from the center line
of the terminal
E Clearance to unven- 12 inches (30 cm)*
tilated soffit
F Clearance to out- 2 feet (60 cm)*
side corner
G Clearance to inside 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 can cause hazardous frost o 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
V
B
L V
C
V
V
F
B
Legend:
V
X
= Vent terminal
= Air supply inlet
Figure 15. Sidewall Power Direct Vent Using Outside Air
1
US Installations
12 inches (30 cm)
• 6 in (15 cm) for appli-
ances ≤ 10,000 Btuh
(3 kW)
• 9 in (23 cm) for appli-
ances >10,000 Btuh (3
kW) and ≤ 50,000 Btuh
(15 kW)
• 12 in (30 cm) for appli-
ances > 50,000 Btuh
(15 kW)
12 inches (30 cm)*
12 inches (30 cm)*
12 inches (30 cm)*
2 feet (60 cm)*
18 inches (45 cm)*
Inside
corner detail
G
V
A
B
B
Fixed
closed
Operable
Fixed
V
Closed B
X
V
Operable
B
J
A
= Area where terminal is not permitted
Table 8. Termination Clearances for Sidewall Power Vent
Type of Clearance
2
H Clearance to each
side of center line
extended above
meter/regulator as-
sembly
I Clearance to service
regulator vent outlet
J Clearance to a non
mechanical air sup-
ply inlet into building
or combustion air
inlet to any other
appliance
K Clearance to a
mechanical air sup-
ply inlet
L Clearance above
paved sidewalk or
paved driveway
located on public
property
M Clearance under
veranda, porch,
deck, or balcony
19
H
15 ft
V
M
V
I
K
Regulator vent outlet
In the event no
regulator is present,
H and I can be
.
disregarded
Canadian Installations
3 ft (91 cm) within a
height of 15 ft (4.6 m)
3 ft (91 cm)
• 6 in (15 cm) for appli-
ances ≤ 10,000 Btuh
(3 kW)
• 12 in (30 cm) for appli-
ances > 10,000 Btuh
(3 kW) and ≤ 100,000
Btuh (30 kW)
• 36 in (91 cm) for appli-
ances >100,000 Btuh
(30 kW)
6 feet (1.83 m)
7 feet (2.13 m)†
12 inches (30 cm) ‡
X
1 2
US Installations
Clearance in accordance
with local installation
codes and the require-
ments of the gas supplier
Clearance in accordance
with local installation
codes and the require-
ments of the gas supplier
• 6 in (15 cm) for appli-
ances ≤ 10,000 Btuh
(3 kW)
• 9 in (23 cm) for appli-
ances >10,000 Btuh (3
kW) and ≤ 50,000 Btuh
(15 kW)
• 12 in (30 cm) for appli-
ances > 50,000 Btuh
(15 kW)
3 feet (91 cm) above
if within 10 feet (3 m)
horizontally
7 ft (2.13 m) for me-
chanical draft systems
(Category I appliances);
vents for Category II and
IV appliances cannot
be located above public
walkways or other areas
where condensate or va-
por can cause a nuisance
or hazard
12 inches (30 cm) ‡