Venting Code; Venting Options; Exhaust Vent Material - IBC CX Series Installation And Operating Manual

When planning a boiler's installation, consider the appropriate vent materials, travel and termination.

3.7.1 Venting code

All venting must be installed in accordance with the requirements of the jurisdiction having
authority: in Canada, Part 8, Venting Systems of the B149.1-10 Code and any other local building
codes are to be followed. In the USA, the National Fuel Gas Code, ANSI 223.1, latest edition,
prevails. Where there is a discrepancy between the installation instructions provided, and the
code requirements, apply the more stringent.

3.7.2 Venting options

These appliances are approved with alternative venting options: either 2-pipe direct vent or vent
pipe with indoor air. With direct vent, combustion air is piped directly to the boiler's air intake from
outdoors. Using the indoor air alternative, air for combustion is drawn from the indoor air
surrounding the boiler.
Provided the maximum overall vent length limit is not exceeded, the boiler may be vented through
the wall, directly through the roof, or upward using an existing, but otherwise unused, chimney as
a vent raceway.

3.7.3 Exhaust vent material

Warning
Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.
Exhaust vent material – Canada
Use PVC, CPVC, Polypropylene (PP), or Stainless Steel (SS) vent component systems approved
under ULC-S636 Standard for Type BH Gas Venting Systems, or stainless steel Type BH venting
systems. ULC-S636 components are certified as systems including pipe, fittings and
cement/primer for PVC/CPVC and must be installed in strict accordance with manufacturers
instructions. The vent temperature is limited by the boiler controller with the use of a flue
temperature sensor to ensure the maximum temperature of the PVC venting material is not
exceeded.
Exhaust vent material – U.S.A
PVC, CPVC, PP, or SS venting materials are approved for use with these boilers in most of the
USA. Check local codes to determine if any materials are prohibited. The vent temperature is
limited with the use of the flue temperature sensor and software to ensure that the maximum
temperature of the PVC venting material is not exceeded. PVC venting material shall be certified
to Sch. 40 ASTM D1785 or D2665. CPVC material shall be certified to Sch. 40/ASTM F441.
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3.7.1 Venting code