Velocity Shadow Series, Installation And Operating Instructions Manual

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Table 7.15: Summary of Split Vent System Options
Option # 25 26
Illustrated in Figure 7.14 7.14
Pipe Penetration Through
Structure
Vent Roof Roof
Intake Wall Wall
Material
Vent
CPVC/PVC
(Note 2)
CPVC/PVC
(Note 2)
Intake PVC PVC
Nominal Diameter
Vent 2” 3” (Note 3)
Intake 2” or 3” 3” (Note 3)
Min Equivalent Vent Length:
Models
080 48” 48”
100 48” 48”
120
Not Permitted
48”
150 52”
180 52”
Max Equivalent Vent Length (Note 1):
Models
080 60ft 135ft
100 60ft 135ft
120
Not Permitted
135ft
150 135ft
180 135ft
Rigid Vent Terminals
Vent
Coupling w
Screen
Coupling w
Screen
Intake
90 Elbow w
Screen
90 Elbow w
Screen
1) Max vent lengths shown also apply to the intake.
2) First 30” plus first exhaust elbow are CPVC.
3) For models 80 and 100: Make increase in vent diameter from 2 to 3” at boiler collar (before first elbow). Reduce intake diameter
from 3” to 2” at intake collar.
All vertical terminals require compatible roof flashing and storm collars
.