K2 Installation Manual

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Figure 7.9: Duravent PolyPro, Selkirk, Polyflue or Centrotherm InnoFlue Horizontal Venting
(Vent Option #3 - 8, Terminal Option A)
Figure 7.10: Duravent PolyPro Horizontal Venting with Concentric Terminal,
(Vent Options #3 & 4, Terminal Option F)
VII. Venting B. Design Requirements Unique to Horizontal Twin Pipe Venting Systems (continued)
PITCH INTAKE AWAY FROM
BOILER IF POSSIBLE
BOILER ROOM
PVC AIR
INTAKE PIPE
BUILDING EXTERIOR
PITCH VENT PIPE 5/8" PER
FOOT TOWARDS BOILER
2" OR 3" DURAVENT
POLYPRO VENT PIPE