Noritz NRC111-DV-NG Installation Manual page 8

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.
()= 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.
8
Clearance
Above grade, veranda, porch, deck,
A=
or balcony
Window or door that may be opened
B=
Permanently closed window
C=
Vertical clearance to ventilated soffit
located above the terminal within a
D=
horizontal distance of 2 feet from the
center of the terminal
Unventilated soffit
E=
Outside corner
F=
Inside corner
G=
Each side of center line extended
H=
above meter/regulator assembly
Service regulator vent outlet
I=
Nonmechanical air supply inlet or
J= combustion air inlet to any other
appliance
Mechanical air supply inlet
K=
Above paved sidewalk or paved
L=
driveway located on public property
Under veranda, porch, deck, or
M=
balcony
Vent Terminal
Air Supply Inlet
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****)
Area Where Terminal
is Not Permitted