Takagi T-H3J-DV / 240H Installation Manual And Owner's Manual page 18

The Indoor models can be vented together using the same exhaust and intake venting.
• Up to 8 water heaters can be common-vented together.
• A non-return valve (Part No. 9008847005) must be used for each water heater that is part of the system.
• The water heaters must all be direct-vented.
• For common-venting pieces and components, the manufacturer recommends
Centrotherm's vent line.
• Check with the current version of the Canadian gas code or authority having
jurisdiction to see if common venting is approved in your area.
• Only the models listed in the table above can be common-vented together.
Different models cannot be common-vented.
CAUTION
Roof
Intake
Condensate drain port
Non-Return Valve
For details on the installation of a common-vent system, please refer to the vent manufacturer's
instructions.
-Common-venting system-
Allowable models for common-venting
T-H3J-DV / 240H
T-H3S-DV / 340H
T-H3-DV / 540H
Typical common-vent installation examples
Roof
Exhaust
wall
Roof
Condensate drain port
Non-Return Valve
18
Page
Installation Manual
Condensate drain port
Non-Return Valve
Exhaust
Intake
wall
Installation
Exhaust
Intake
wall