10
Fig. 11
A
V
V
X
G
INSIDE CORNER
DETAIL
D
E
v
v
B
L
v
v
M
K
v
v
v
v
B
B
B
B
A
J
X
X
B
C
F
FIXED
CLOSED
FIXED
CLOSED
OPER
ABLE
OPERABLE
VENT TERMINAL
AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
Power Vent Terminal Clearances (uses room air for combustion)
A
above grade, veranda, porch,
deck or balcony
12 in.
G
To inside corner
18 in.
B
to window or door that may
be opened
4 ft. below or to
side
of opening;
1 ft. above opening
J
to a non-mechanical air supply
inlet
into building or combustion air
inlet
to any other appliance
4 ft. below or to side of
opening,
1ft. above opening
C
to permanently closed window
0 in.
K
to a mechanical air supply inlet
3 ft. above if within
10ft. horizontally
D
Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 ft. from the
center line of the terminal
12 in.†
L
above paved sidewalk or paved
driveway
located on public property
7 ft.†
E
to unventilated soffit
12 in.
M
under veranda, porch, deck, or
balcony
12 in.‡
F
to outside
24 in.
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code:
† 1. Where local experience indicates condensate is a problem with Category IV appliances, the vent shall not terminate:
• over public walkways; or
• near soffit vents or crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or cause property damage; or
• where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves or other equipment.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
TERMINATION CLEARANCES SIDE WALL POWER VENT
Note: The following picture and table are intended to illustrate clearance requirements, and do not serve as a
substitute for locally adopted installation codes.
Содержание Standard Residential
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