Burnham K2WTC Installation, Operating And Service Instructions page 34

VII. Venting
C. Design Requirements Unique to Vertical Venting Systems (continued)
Figure 7.17: Duravent PolyPro, Selkirk Polyflue or Centrotherm InnoFlue Vertical Single Wall PP Venting
(Vent Options #6-8, Terminal Option H)
Figure 7.18: Duravent PolyPro Vertical Venting with Concentric Terminal
(Vent Option #6, Terminal Option K)
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