Navien CH-180 Installation Manual - Venting Clearances:
Venting Clearances:
ANSI Z233.1 / NFPA 54 and CGA B149.1 Natural Gas and Propane Installation Code.
All clearance requirements are in accordance with ANSI Z21.10.3 and the
National Fuel Gas Code, ANSI Z223.1 / NFPA 54 and CGA B149.1 Natural
Gas and Propane Installation Code.
Clearance To:
Above grade, veranda, porch, deck or balcony
Window or door that may be opened
Permanently closed window
Vertical clearance to ventilated soffit located
above the terminal within a horizontal distance
of 2 feet from the center of the terminal
Unventilated soffit
Outside corner
Inside corner
Each side of center line extended above
meter/regulator assembly
Service regulator vent outlet
Non-mechanical air supply inlet or combustion
air inlet to any other appliance
Mechanical air supply inlet
Above paved sidewalk or paved driveway
located on public property
Under veranda, porch, deck, or balcony
1'
4'
*
*
*
*
*
*
*
1'
3' above if within 10'
horizontally
*
*
1'
3'
*
*
*
*
*
3' within a height 15'
above
meter/regulator
assembly
3'
3'
6'
7'
1'
US Direct Vent
Indoor Installation
Canada Direct Vent
Indoor Installation
VENTING
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