Venting Clearances - Navien NR-180 Installation Manual

Navien Gas Water Heater Installation

█ 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:
A Above grade, veranda, porch, deck or balcony
B Window or door that may be opened
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
Each side of center line extended above
H
meter/regulator assembly
I Service regulator vent outlet
Non-mechanical air supply inlet or combustion
J
air inlet to any other appliance
K Mechanical air supply inlet
Above paved sidewalk or paved driveway
L
located on public property
M Under veranda, porch, deck, or balcony
US Direct Vent Canada Direct Vent
Indoor Installation Indoor Installation
1' 1'
1' 3'
* *
* *
* *
* *
* *
3' within a height
15'above
*
meter/regulator
assembly
* 3'
1' 3'
3' above if within 10'
6'
horizontally
* 7'
* 1'
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