Bosch Singular 4000 - Snorkel Flue; Non-Concentric Sidewall Venting; Concentric Sidewall Venting

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Installation Instructions
Singular Combi Boiler - BTC 439003301 B (2021/07)
6.5.3 Snorkel Flue
Figure 40
10" (254 mm) min.
12" (300 mm) min.
12" (300 mm) min.
Schedule 40 PVC pipe
WARNING:
 Maintain 12" (300 mm) min. (18" (450 mm) min. for
Canada) clearance above highest-anticipated snow level.
Maximum of 24" (600 mm) above roof.
6.5.4 Non-Concentric Sidewall Venting
Figure 41
12" (300 mm) min.
10" (254 mm) min.
NOTICE:
 Install a bird screen at the end of the intake air pipe and
exhaust pipe.
 Air is drawn from a different location at a minimum of 12"
(300mm) from the exhaust termination. Try to minimize the
length of the intake air pipe with this venting.
6.5.5 Concentric Sidewall Venting
The following terminations can also be used:
Duravent PolyPro Horizontal Concentric Termination Kit.
 2 in x 4 in Concentric Vent Kit #2PPS-HK
 3 in x 5 in Concentric Vent Kit #3PPS-HK
Figure 42
Combustion air
Vent
Combustion air
Maintain 12"
(300 mm) min.
Vent
1" (25 mm) min.
WARNING:
 Maintain 12" (300 mm) min. (18" (450 mm) min. for
Canada) clearance above highest-anticipated snow level.
Maximum of 24" (600 mm) above roof.