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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
28 and 29. These units can be identified by the Category IV and the control number M9 as noted on the unit’s rating
plate. Note: PB/FN0502 - 1302 - F9 models with Category I sized vent connection can be sidewall vented with Category
IV vent material using the vent decreaser included in the SVK Kit listed in Table 2H. This venting technique with
corresponding vent decreasers is not available on the larger PB/FN1501 - 2001 models.
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 22 and 23).
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 25 and 26.
TABLE - 2G
SIDEWALL AIR AND VENT TERMINATION SIZES
MODEL
CAT IV
CAT IV
KIT
MODEL
CAT IV
CAT IV
KIT
MODEL
CAT IV
CAT IV
KIT
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
PB/FN0502-M9 5" 4" HDK3052 PB/FN0502-F9 5" 4" HDK3040 PB/FN1501-M9 6" 6" HDK3049
PB/FN0752-M9 5" 5" HDK3053 PB/FN0752-F9 5" 5" HDK3041 PB/FN1701-M9 7" 7" HDK3050
PB/FN1002-M9 6" 6" HDK3049 PB/FN1002-F9 6" 6" HDK3042 PB/FN2001-M9 8" 8" HDK3051
PB/FN1302-M9 6" 8" HDK3054 PB/FN1302-F9 6" 8" HDK3043
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Vent Cap
Air Inlet Cap
F
CAT IV
Horizontal DirectAire installation with vertical or sidewall combustion air -
page 15.
The Horizontal DirectAire 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 DirectAire 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
28 and 29. These units can be identified by the Category IV and the control number M9 as noted on the unit’s rating
plate. Note: PB/FN0502 - 1302 - F9 models with Category I sized vent connection can be sidewall vented with Category
IV vent material using the vent decreaser included in the SVK Kit listed in Table 2H This venting technique with
corresponding vent decreasers is not available on the larger PB/FN1501 - 2001 models.
The Horizontal DirectAire vent system with a vertical air inlet requires a sidewall vent kit. The Horizontal DirectAire 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 22 and 23).
The Horizontal DirectAire 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 24 and 25.
TABLE - 2H
SIDEWALL VENT TERMINATION SIZES
MODEL
CAT IV
CAT IV
KIT
MODEL
CAT IV
CAT IV
KIT
MODEL
CAT IV
CAT IV
KIT
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
PB/FN0502-M9
5"
4" SVK3069 PB/FN0502-F9 5" 4" SVK3056 PB/FN1501-M9 6" 6" SVK3018
PB/FN0752-M9
5"
5" SVK3070 PB/FN0752-F9 5" 5" SVK3057 PB/FN1701-M9 7" 7" SVK3019
PB/FN1002-M9
6"
6" SVK3018 PB/FN1002-F9 6" 6" SVK3058 PB/FN2001-M9 8" 8" SVK3068
PB/FN1302-M9
6"
8" SVK3068 PB/FN1302-F9 6" 8" SVK3059
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Vent Cap
Installation & Operation Manual