Applications; Exhaust Vent Material - IBC EX Series Installation & Operating Manual

3.5.2 Applications

All EX series boilers are approved with alternative venting options: either 2-pipe direct vent or vent
pipe with indoor air. With the direct vent case, combustion air is piped directly to the boiler's air
intake from outdoors (see
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.

3.5.3 Exhaust vent material

Warning
Condensate can cause corrosion of metal roofing components and other roofing
materials. Check with the builder or roofing contractor to ensure that materials are
resistant to acidic condensate. pH levels can be as low as 3.0.
Exhaust vent material – CANADA
Use PVC, CPVC, Polypropylene (PPs), 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*. 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 – USA
PVC, CPVC, PPs, 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.
Exhaust vent material
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenolsulfone) in
venting systems is prohibited.
Do not use ABS or any cellular core pipe for exhaust venting.
The exhaust fitting has a 6" PVC (schedule 40) connection. Use fittings to adapt to either PPs or SS
venting material. Insert exhaust venting directly into the 6" female stainless steel fitting, and secure
with the built-in clamp (see
Vent termination clearance on page 30
Figure 11 ).
21
3.5.2 Applications
for air intake piping requirements).