Important venting notes for Vitodens 100/200/222

  1. 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.
  2. For flexible PPs vent systems:
    PPs vent material must be ULC S-636 certified for Category IV boilers. 
  3. For CPVC vent systems: 
    CPVC vent material must be ULC/UL listed, for Category IV boilers. 
  4. For stainless steel vent systems:
    Stainless steel vent material must be ULC/UL listed, stainless steel AL29-4C for Category IV boilers.