Burnham K2WTC - Page 32

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107774-01 - 9/17
VII. Venting C. Design Requirements Unique to Vertical Venting Systems (continued)
Table 7.14: Equivalent Length of Flex Pipe
Equivalent Length (ft)
Flex Vent (1 ft):
3” DuraVent PolyPro Flex 2.0 ft
3” Centrotherm InnoFlue Flex 2.3 ft
3” Selkirk Polyue 2.3 ft
3” Duravent FasNSeal Flex 1.0 ft
B-Vent Air Chase (1ft):
3” Flex Vent in 6” (or larger) B-Vent 1.0 ft
Note: Up to four 45 degree bends may be made in ex pipe or air chase.
These bends are not counted when guring equivalent length.