Instructions / Assembly
14
Installing the Water Heater
Direct Vent Terminal Location
D
V
V
E
FIXED
CLOSED
O
P
ERAB
LE
O
PERABLE
FIXED
CLOSED
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 Area Where Terminal Is Not Permitted
US Installations
1
A = Clearance above grade, veranda, porch,
deck or balcony
1 ft.
B = Clearance to window or door that may be
opened
6 in. for appliances ≤ 10,000 Btuh ,
9 in. for appliances > 10,000 Btuh and ≤ 50,000 Btuh,
12 in. for appliances> 50,000 Btuh
C = Clearance to permanently closed window *
D = Vertical clearance to ventilated soft lo-
cated above the terminal within a horizontal
distance of 2 feet from the center line of the
terminal
*
E - Clearance to unventilated soft *
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 in. for appliances ≤ 10,000 Btuh,
9 in. for appliances > 10,000 Btuh and ≤ 50,000 Btuh,
12 in. for appliances> 50,000 Btuh
K - Clearance to a mechanical air supply inlet 3 ft. above if within 10 ft. 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 specied 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".
The following information should be used for determining the proper location of the vent terminal for the water heater.