User Guide

26
TERMINATION CLEARANCES (SIDEWALL)
Figure 21
Vent terminal clearances for “Power Direct Vent” installations.
A
Clearance above grade, veranda,
porch, deck or balcony
12” H
Clearance to each side of center
line extended above meter/regulator
assembly
N/A
B
Clearance to window or door that may
be opened
4’ below or to side
of opening; 1’ above
opening
I
Clearance to service regulator vent
outlet
3’*
C
Clearance to permanently closed
window
12” J
Clearance to a non mechanical
air supply inlet into building or
combustion air inlet to any other
appliance
4’ below or to side of
opening; 1 foot above
opening.
D
Vertical clearance to ventilated soffi t
located above the terminal within
a horizontal distance of 2’ from the
center line of the terminal
12” K
Clearance to a mechanical air supply
inlet
3’ above if within 10’
horizontally
E Clearance to unventilated soffi t 12” L
Clearance above paved sidewalk or
paved driveway located on public
property
7’
F Clearance to outside corner 2’ M
Clearance under veranda, porch,
deck, or balcony
12”‡
G Clearance to inside corner 18”
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the fl oor.
INSIDE CORNER
DETAIL
FIXED
CLOSED
OPERABLE
FIXED
CLOSED
OPERABLE
Vent terminal
Air supply inlet
Area where is not permitted
Gas meter / regulator
C
B
B
B
B
B
J
A
K
M
F
B
L
E
D
I
V
V
V
V
V
V
V
V
V
V
X
X
X
G
A