Velocity Shadow Series, Installation And Operating Instructions Manual

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Table 7.11: Summary of Vertical Twin Pipe Venting Options
Option 10 11
Illustrated in Figure 7.12, 713 7.12, 7.13
Pipe
Penetration
through
Structure
Vent Roof Roof
Intake Roof Roof
Material
Vent
CPVC/PVC
(Note 2)
CPVC/PVC
(Note 2)
Intake PVC PVC
Nominal
Diameter
Vent 2” 3” (Note 4)
Intake 2” 3” (Note 4)
Min Equivalent Vent Length:
Models
080 12” 12”
100 12” 12”
120
Not
Permitted
12”
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
Terminal
Option H
(Fittings)
Vent
Coupling w
Screen
Coupling w
Screen
Intake
180 Elbow
w Screen
180 Elbow
w Screen
Terminal Option I
(Ipex FGV Concentric)
Ipex 196105
(Note 3)
Ipex 196006
(Note 3)
Terminal Option J
(Diversitech CVENT
Concentric)
CVENT-2 CVENT-3
Notes:
1) Max vent lengths shown also apply to the intake. For example, Vent Option #10 may have up to 60ft of vent pipe and also up to 60
ft of intake pipe.
2) First 30” of vent and vent Elbow connected to boiler must be CPVC. Downstream vent pipe can be PVC except as noted in text.
3) Ipex FGV Concentric Terminal available in various lengths and also CPVC (see text).
4) 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.