18
2
Venting
E
CAT IV
Condensing vent options: CAT IV
Horizontal direct vent installation with sidewall combustion air inlet - see
page 15.
The horizontal direct vent system is installed with a Category IV flue and a separate combustion air pipe to the outdoors.
The flue outlet and combustion air intake must both terminate on the same sidewall.
The connection from the appliance flue outlet to the sidewall vent cap MUST be made with listed Category IV vent
materials and accessories. The installer must supply suitable vent pipe material. The horizontal direct vent must be
purchased from the appliance manufacturer.
The termination point for the flue products must follow the sidewall vent termination clearance requirements on pages
25 and 26. These units can be identified by the Category IV as noted on the unit’s rating plate.
The horizontal direct vent kit includes the wall penetration assembly and the discharge screen assembly for the flue and
a combustion air inlet cap. All required vent pipe and fittings must be purchased locally.
Follow all requirements in the
General Venting
and
Category IV General Venting
sections for proper installation and for
venting flue products to the outdoors with a sidewall termination (see pages 19 and 20).
The horizontal direct vent system requires the installation of an additional pipe to supply combustion air from outdoors
directly to the appliance. Follow all requirements under the
Combustion Air Inlet
section on pages 22 and 23.
TABLE - 2G
SIDEWALL AIR AND VENT TERMINATION SIZES
MODEL
CAT IV
CAT IV
KIT
MODEL
CAT IV
CAT IV
KIT
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
VWH0500
5"
4"
9910119000
VWH1500
6"
6"
9910119002
VWH0750
5"
5"
9910119001
VWH2000
8"
8"
9910119006
VWH1000
6"
6"
9910119002
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--
--
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Vent Cap
Air Inlet Cap
F
CAT IV
Horizontal vent/air installation with vertical or sidewall combustion air -
page 15.
The Horizontal Vent/Air vent system terminates the flue at the sidewall and air inlet at either the rooftop or a sidewall
opposite the vent termination. The flue outlet and combustion air intake terminate in different pressure zones.
The connection from the appliance flue outlet to the sidewall vent cap MUST be made with listed Category IV vent
materials and accessories. The installer must supply suitable vent pipe material. The Horizontal Vent/Air vent cap must
be purchased from the appliance manufacturer.
The termination point for the flue products must follow the sidewall vent termination clearance requirements on pages
25 and 26. These units can be identified by the Category IV as noted on the unit’s rating plate.
The Horizontal Vent/Air vent system with a vertical air inlet requires a sidewall vent kit. The Horizontal Vent/Air vent
system with a sidewall air inlet requires a horizontal direct vent kit. All required vent pipe and fittings must be purchased
locally.
Follow all requirements in the
General Venting
and
Category IV General Venting
sections for proper installation and for
venting flue products to the outdoors with a sidewall termination (see pages 19 and 20).
The Horizontal Vent/Air vent system requires the installation of an additional pipe to supply combustion air from
outdoors directly to the appliance. Follow all requirements under the
Combustion Air Inlet
section on pages 21 and 22.
TABLE - 2H
SIDEWALL VENT TERMINATION SIZES
MODEL
CAT IV
CAT IV
KIT
MODEL
CAT IV
CAT IV
KIT
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
VWH0500
5"
4"
9910118000
VWH1500
6"
6"
9910118002
VWH0750
5"
5"
9910118001
VWH2000
8"
8"
9910118004
VWH1000
6"
6"
9910118002
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--
--
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Vent Cap
Installation & Operation Manual
