Installation Guide

36 KBD Series Manual
PVC/CPVC Equivalent Vent Length Calculaon Sheet
Note: Ensure SW 1 in DIPSW 1 is in “OFF” posion if vent length is greater than 21 (6.4m).
Fing / Terminaon Type
Number of Equivalent Vent Total Equivalent
1) 90 elbow x
5
=
2) 45 elbow x
2.5
=
3) IPEX Low Prole Terminaon X
5
=
4) IPEX 4" Concentric Terminaon x
20
=
5) IPEX 3" Concentric Terminaon x
20
=
6)
3" Tee Terminaon
x 5 =
7)
4" Tee Terminaon
x
5
=
8) 3" Snorkel Terminaon x
15
=
9) 4" Snorkel Terminaon x
15
=
10) Length of Straight Secon in feet NA =
Total (add up
lines 1 through
10)
Equivalent Vent Length Calculaon Sheet