Venting System - A.O. Smith Innovo 12-160 Installation, Service & Maintenance Manual

Condensing high-efficiency water heater
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Venting system

There are several alternatives for installation of the air inlet and flue gas outlet:
Installation
Version
type
B23
Open
C13
Closed
C33
Closed
C43
Closed
C53
Closed
C63
Closed
This manual does not discus installation type B23. When you need a B23 system, contact
A.O. Smith for more information.
Caution
Always make sure that the flue gas outlet discharges into an area approved for the
correct type of installation.
Caution
The use of a different wall or roof terminal can result in incorrect functioning of the water
heater. Use the part number from the table to order a terminal set from your supplier or
the manufacturer.
Description
Air for combustion is drawn from installation room
and the flue gasses leave the water heater via a
vertical roof terminal.
Concentric and/or parallel venting system, with
horizontal air inlet and flue gas outlet, in same
pressure zone.
Concentric and/or parallel venting system, with
vertical air inlet and flue gas outlet, in same
pressure zone.
Water heaters on common air inlet and flue gas
outlet (concentric and/or parallel) in a multiple
floor building.
Separate air inlet and flue gas outlet terminal
types mixed. Air inlet and flue gas outlet
termination may be in different pressure zone.
Water heaters supplied without venting materials.
These water heaters must be installed in
compliance with local regulations. The water heater
is intended to be connected to a separately
approved and marketed venting system.
Installation, Maintenance and Service part

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