8
Vent Terminal
Clearance
A=
Above grade, veranda, porch, deck,
or balcony
B=
Window or door that may be opened
C=
Permanently closed window
D=
Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet from the
center of the terminal
*
E=
Unventilated soffit
*
F=
Outside corner
*
G=
Inside corner
*
H=
Each side of center line extended
above meter/regulator assembly
3' within a height 15' above
meter/regulator assembly
I=
Service regulator vent outlet
3'
J=
Nonmechanical air supply inlet or
combustion air inlet to any other
appliance
4' below or to the side of
opening, or 1' above opening
(36")
4' below or to the side of
opening, or 1' above opening
(36")
K=
Mechanical air supply inlet
3' above if within 10' (6')
L=
Above paved sidewalk or paved
driveway located on public property
Under veranda, porch, deck, or
balcony
(7' ***)
M=
()= indicates clearances required in Canada
*Maintain clearances in accordance with local installation codes and the requirements of the gas supplier
***A vent shall not terminate directly above a sidewalk or paved driveway that is located between two
single family dwellings and serves both dwellings.
****Permitted only if veranda,porch,deck,or balcony is fully open on a minimum of two sides beneath the floor.
* (12"- Canada Only****)
*
12" (12")
12" (36")
*
*
*
*
3' within a height 15' above
meter/regulator assembly
3'
12" (36")
3' above if within 10' (6')
(7' ***)
* (12"- Canada Only****)
*
12" (12")
Indoor Installation
(See p.9)
Outdoor Installation
(See p.9)
Air Supply Inlet
Area Where Terminal
is Not Permitted
Clearance Requirements from Vent Terminations to Building Openings
* All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code,
ANSI Z223.1 and in Canada, in accordance with NSCNGPIC.
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