Burnham K2WTC - Page 29

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Option 5 6 7 8
Illustrated in Figure 7.15, 7.17 7.17, 7.18 7.17 7.17
Pipe
Penetration
through
Structure
Vent Roof Roof Roof Roof
Intake Roof Roof Roof Roof
Material
Vent
CPVC/
PVC
(Note 2)
DuraVent
PolyPro
(Rigid)
Selkirk
Polyue
Centro-
therm
InnoFlue
SW
Intake PVC PVC PVC PVC
Nominal
Diameter
Vent 3” 3” 3” 3”
Intake 3” 3” 3” 3”
Min Equivalent Vent Length:
Models
135 12” 12” 12” 12”
150 52” 52” 52” 52”
180 52” 52” 52” 52”
Max Equivalent Vent Length (Note 1):
Models
135 135ft 135ft 135ft 135ft
150 135ft 135ft 135ft 135ft
180 135ft 135ft 135ft 135ft
Terminal Option H
(Fittings)
Vent
Coupling
w/Screen
3PPS-12B
or
3PPS-36B
w/Screen
3PF-10UV
or
3PF-39UV
w/Screen
ISEP03 or
ISEP0339
w/Screen
Intake
180 Elbow
w/Screen
180 Elbow
w/Screen
180 Elbow
w/Screen
180 Elbow
w/Screen
Terminal Option I
(Ipex FGV Concentric)
Ipex
196006
(Note 3)
Not Permitted
Terminal Option J
(DiversiTech CVENT
Concentric)
CVENT-3 Not Permitted
Terminal Option K
(DuraVent Vertical
Concentric)
Not
Permitted
3PPS-VK Not Permitted
Notes:
1. Max vent lengths shown also apply to the intake. For example, Vent Option #1 may have up to 135ft of vent pipe and also up to 135 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).
All vertical terminals require compatible roof ashing and storm collars.
VII. Venting C. Design Requirements Unique to Vertical Venting Systems (continued)
Table 7.13a: Summary of Vertical Twin Pipe Venting Options