Important venting notes
For Vitodens 100 / 200 / 222
- For coaxial PPs vent systems:
PPs coaxial vent material must be ULC S-636 certified for Category IV boilers.
Do not mix non-ULC S-636 with ULC S-636 venting.
- For flexible PPs vent systems:
PPs vent material must be ULC S-636 certified for Category IV boilers.
- For CPVC vent systems:
CPVC vent material must be ULC/UL listed, for Category IV boilers.
- For stainless steel vent systems:
Stainless steel vent material must be ULC/UL listed, stainless steel AL29-4C for Category IV boilers.