I
Venting Clearances:
All clearance requirements are in accordance with ANZI Z21 . 1 0.3 and the
National Fuel Gas Code, ANSI Z223. 1 / N FPA 54 and CGA 81 49. 1
National Gas and Propane I nstallation Code.
ANSI Z223.1 / NFPA 54 and CSA B 1 49.1 National Gas and Propane Installation Code.
Vent Terminal
(/)
Air Supply Inlet
Clearance To:
US Direct Vent
Canada Direct Vent
Indoor Installation
Indoor Installation
A
Above grade, veranda, porch, deck or balcony
1 '
1 '
B
Window or door that may be opened
1 '
3'
C
Permanently closed window
*
*
Vertical clearance to ventilated soffit located
D
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
*
*
3' within a height
H
Each side of center line extended above
*
1 5'above
meter/regulator assembly
meter/regulator
assembly
I
Service regulator vent outlet
*
3'
J
Non-mechanical air supply inlet or combustion
1 '
3'
air inlet to any other aooliance
K
Mechanical air supply inlet
3' above if within 1 O'
6'
horizontally
L
Above paved sidewalk or paved driveway
*
7'
located on public property
M
Under veranda, porch, deck, or balcony
*
1'
Summary of Contents for CC-180
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