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6.6 Approved Venting Materials
6 - COMBUSTION AIR AND VENT PIPING
6.5 Vent Termination
•
Terminate combustion air and vent pipes with fittings or
coaxial vent kit.
Use horizontal pipe for vent and 90° elbow for
combustion air termination when using fittings.
• Separate vent terminal from air inlet terminal to prevent
flue gas recirculation. If T-Terminal is used on flue pipe
at sidewall, air inlet terminal shall be at least 36" or more
away from vent terminal.
• Locate combustion air termination as far as possible from
swimming pool, swimming pool pump house, and other
sources of airborne chlorine.
• Locate combustion air and vent terminals as required by
authority having jurisdiction.
• Refer to Figures 6-2 through 6-17 for approved vent
termination schemes.
WARNING
Manufacturer recommends this condensing boiler be
vented with approved polypropylene venting material.
Use only materials listed below for vent pipe, intake
air pipe, and fittings. Failure to comply could result in
death or serious injury.
!
WARNING
Do not use cellular core pipe. Only specified sized
pipes are to be used. When using venting material
other than boiler manufacturer's venting, note the
correct installation procedure. Failure to follow these
instructions could result in death, or serious injury.
!
WARNING
•
Covering non-metallic vent pipe and fittings with
thermal insulation shall be prohibited.
•
Use of cellular core PVC for venting flue gas could
result in death, or serious injury.
• Coaxial venting shall be fastened with screws. Dual
flue venting is NOT fastened with screws.
!
Installation shall conform to requirements of authority having
jurisdiction or in absence of such requirements:
• USA - National Fuel Gas Code, ANSI Z223.1/NFPA 54.
1.
Venting shall be properly supported.
2.
Boiler shall not support any type of vent system.
3.
All piping, glue, solvents, cleaners, fittings and
components must conform to ASTM and ANSI standards.
In Canada ULC S636 and in the USA UL 1738 schedule 40
CPVC are the only approved vent system to be used as an
alternative to polypropylene venting for the exhaust pipe
4.
Manufacturer requires use of a spring clamp at every
push-fit gasket connection when using a single wall
polypropylene vent system.
PN 240012363 REV. B [03/29/2019]
