18
Direct Vent Terminal Clearances
D
V
V
E
FIXE
D
CLO
SED
OPE
RAB
LE
OPE
RAB
LE
FIXE
D
CLOS
ED
v
v
B
L
F
C
B
v
v
v
X
B
B
B
A
J
B
I
H
X
v
M
K
v
G
A
V
Vent Terminal X
Air Supply Inlet
A
rea Where Terminal Is Not Permitted
US Installations
1
A = Clearance above grade, veranda, porch,
deck or balcony
12 inches (30 cm)
B = Clearance to window or door that may be
opened
6 inches (15 cm) for appliances ≤ 10,000 Btuh (3 kW), 9
inches (23 cm) for appliances > 10,000 Btuh (3kW) and ≤
50,000 Btuh (15 KW), 12 inches (30 cm) for appliances>
50,000 Btuh (15 kW)
C = Clearance to permanately closed window
*
D = Vertical clearance to ventilated soffit lo
-
cated above the terminal within a horizontal
distance of 2 feet (61 cm) from the center
line of the terminal
*
E - Clearance to unventilated soffit
*
F - Clearance to outside corner
*
G - Clearance to inside corner
*
H - Clearance to each side of centerline extend-
ed above meter/regulator assembly
*
I - Clearance to service regulator vent outlet
*
J - Clearance to nonmechanical air supply inlet
to building or the combustion air inlet to any
other appliance
6 inches (15 cm) for appliances ≤ 10,000 Btuh (3 kW), 9
inches (23 cm) for appliances > 10,000 Btuh (3kW) and ≤
50,000 Btuh (15 KW), 12 inches (30 cm) for appliances>
50,000 Btuh (15 kW)
K - Clearance to a mechanical air supply inlet
3 feet (91 cm) above if within 10 feet (3 m) horizontally
L - Clearance above paved sidewalk or paved
driveway located on public property
*
M - Clearance under veranda, porch, deck, or
balcony
*
1
In accordance with the current ANSI Z223.1/ NFPA 54 National Fuel Gas Code
* For clearances not specified in ANSI Z223.1/ NFPA 54 the following statement shall be included:
"Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's installation
instructions".
Installing the Water Heater
Summary of Contents for Power Direct Vent Series
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