Takagi T-H3J-DV Installation Manual And Owner's Manual page 19

-Direct-vent and single vent Illustrations-
Typical installations using stainless steel vents
Horizontal Installation
• The diagram above shows direct-vent installations. For single vent installation, connect a 4" elbow
directly on the intake vent collar instead of a straight pipe. See the instructions below for the detail.
• For details of the optional items, refer to the Installation manual for each Optional item.
• Regarding the clearances from the exhaust terminal to the air inlet or opening, refer to the
next few pages.
• Follow all vent system manufacturer's instructions and all local codes.
• Use 4" Category III/IV approved or Special BH, single or double wall stainless steel vent pipe.
<How to install stainless steel vent with the indoor models>
4" vent connection for direct-vent installation
1. Connect 4" stainless steel vent
straight pipes directly on the
exhaust/intake vent collar of the
water heater.
4" vent connection for single vent installation
1. Connect a 4" stainless steel vent
straight pipes directly on the
exhaust vent collar of the
water heater.
2. Connect a 4" elbow directly
on the intake vent collar of the
water heater.
Wall
Roof
Sidewall vent
termination
4" stainless
steel vent
straight pipe
Intake vent collar
(Female)
4" elbow with
bird screen
Intake vent collar
(Female)
19
Page
Installation Manual
Installation
Vertical Installation
Rain cap
Roof flashing
Fire stop
4" stainless steel
vent straight pipe
Exhaust vent collar
of the Indoor models
(Female)
4" stainless steel
vent straight pipe
Exhaust vent collar
of the Indoor models
(Female)