IBC Sl Series Installation & Operating Manual page 29

Re: venting passage through ceiling and floor:
Confirm material meets local codes including fire stopping requirements.
Check the local jurisdiction on the minimum initial length of pipe that should be
exposed or accessible for inspection.
Follow the local codes for pipe clearances - no IBC requirements.
Ensure that piping is liquid and pressure tight.
3.7.4.1 Air intake and exhaust vent length allowance
Warning
Follow all installation instructions supplied by the piping and fitting manufacturer.
Ensure that adequate separation is maintained between the air intake inlet and the exhaust vent
terminal. The pipe length and allowance for pipe fittings, terminations and flexible pipe used for
calculating total equivalent length are shown in the following table:
Intake/Exhaust
SL 10-85 G3
2-inch rigid pipe 100 ft
3-inch rigid pipe 240 ft
90° elbow allow 8 ft for each elbow
90° long sweep allow 5 ft for each elbow
elbow
45° elbow allow 3 ft for each elbow
PPs 87-90° allow 8 ft for each elbow
elbows
(Intake only) Air allow 8 ft
Intake Filter
(IBC part P-357)
2-inch Stainless
Intake: No
Sidewall
additional
Terminal (IBC
allowance
part P-256)
Exhaust: Allow 20
ft equivalent of 2-
inch Sched. 40
3-inch Stainless
Intake: No additional allowance
Sidewall
Exhaust: Allow 20 ft equivalent of 3-inch Sched. 40
Terminal
Vent Lengths
Maximum Equivalent Length
SL 14-115 G3 SL 20-160 G3
100 ft 35 ft
240 ft 170 ft
Not allowed
Intake: No
additional
allowance
Exhaust: Allow 20
ft equivalent of 2-
inch Sched. 40
25
3.7.4 Direct vent
SL 30-199 G3
n/a
150 ft
Not allowed