A.O. Smith T-H3S-DV Installation Manual And Owner's Manual page 22

A
D
E
B
L
Clearance above grade, veranda, porch, deck, or
A
balcony
B Clearance to window or door that may be opened
C Clearance to permanently closed window
Vertical clearance to ventilated soffit located above
the vent terminator within a horizontal distance
D
of 2 feet (61cm) from the center line of the
terminator
E Clearance to unventilated soffit
F Clearance to outside corner
G Clearance to inside corner
Clearance to each side of center line extended
H
above meter/regulator assembly
I Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to
J building or the combustion air inlet to any other
application
K Clearance to mechanical air supply inlet
Clearance above paved sidewalk or paved driveway
L
located on public property
M Clearance under veranda, porch deck, or balcony
*For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CSA-B149.1, please use clearances in accordance
with local installation codes and the requirements of the gas supplier.
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-Vent termination clearances-
INSIDE CORNER DETAIL
G
V
B
C
V
V
B
V
F B
B
22
Page
V
Vent terminal
X
Air supply inlet
Area where is not permitted
H
B
V
X
V
J
A
Gas meter / regulator
Canada
Direct-vent and other Direct-
than Direct-vent vent
1 foot 1 foot
3 feet 1 foot
* *
* *
* *
* *
* *
3 feet *
3 feet *
3 feet 1 foot
6 feet 3 feet
7 feet *
1 foot *
Installation Manual
Installation
M
X
I
V
K
U.S.A
Other than
Direct-vent
1 foot
4 feet from below or
side opening. 1 foot
from above opening
*
*
*
*
*
*
*
4 feet from below or
side opening. 1 foot
from above opening
3 feet
7 feet
*