Navien Gas Water Heater Installation
29
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Venting Clearances:
All clearance requirements are in accordance with ANSI Z21.10.3 and the
National Fuel Gas Code, ANSI Z223.1 / NFPA 54 and CAN/CGA B149.1
National Gas and Propane Installation Code.
ANSI Z223.1 / NFPA 54 CAN/CGA B149.1 National Gas and Propane Installation Code
.
Clearance To:
US Direct Vent
Indoor Installation
Canada Direct Vent
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
*
*
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
Non-mechanical air supply inlet or combustion
air inlet to any other appliance
1'
3'
K
Mechanical air supply inlet
3' above if within 10'
horizontally
6'
L
Above paved sidewalk or paved driveway
located on public property
*
7'
M
Under veranda, porch, deck, or balcony
*
1'
VENTING
