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This Water Heater is suitable for Common vent
System. To make a Common Vent System, contact
Noritz America at 1-866-766-7489 or
scan the following two-dimensional
barcode and then refer to the
Common Vent Installation Manual for
detail information.
Common Vent
Combustion
air
Increasers are required when using 3 in. flexible pipe.
3 in. Elbow
ISIS0203
(Centrotherm®)
H
V
Slope the Vents
Upward
Slope the Vents
Upward
6.3 Select a Vent Type
Combustion air is
supplied from the
outdoors. Combustion
air and exhaust are
seperate vent pipes.
air
Direct Vent
Combustion air is
supplied from the
surrounding indoor air.
air
Non-Direct Vent
[With SV Conversion Kit (SV-CK-2-1 or SV-CK-2)]
[With Flex Vent 2 in. Conversion Kit (EZ2-CK-1 or
EZ2-CK)]
The Water Heater can
be installed outside
using the Outdoor
Vent Cap.
air
Exhaust gasses and
combustion air must not
be combined into a single
PVC pipe using a “Y”
fitting.
WARNING
air
Single
Pipe
(e.g. SV-CK-2-1)
Combustion air is supplied
from the surrounding
indoor air.
Flex Vent 2 in. Conversion Kit
(EZ2-CK-1 or EZ2-CK) must be
used when using 2 in. flexible PP
pipe for vent pipe installation.
2 in. flexible PP pipe: Flex Vent
2 in. Kit (EZ2FVK-1, EZ2FVK-2 or
EZ2FVP35-3)
air
(e.g. EZ2-CK-1)
Outdoor
[With Outdoor Vent Cap (VC-6-1 or VC-6)]
Venting the Water Heater