PVC/CPVC Equivalent Vent Length Calculation Sheet
Fitting / Termination Type
1)
90 elbow
2)
45 elbow
3)
IPEX Low Profile Termination
4)
IPEX 4" Concentric Termination
5)
IPEX 3" Concentric Termination
6)
3" Tee Termination
4" Tee Termination
7)
8)
3" Snorkel Termination
9)
4" Snorkel Termination
10)
Length of Straight Section in feet
Note: Ensure SW 1 in DIPSW 1 is in "OFF" position if vent length is greater than 21ft (6.4m).
40
Equivalent Vent Length Calculation Sheet
Number of
fittings
NA
C199 Manual
Equivalent Vent
Length
5
x
x
2.5
X
5
20
x
x
20
x
5
5
x
x
15
x
15
Total (add up
lines 1 through
Total Equivalent
Length
=
=
=
=
=
=
=
=
=
=