Rinnai RU98e Installation And Operation Manual page 16

Flue Installation with Centrotherm Venting (indoor models only)
Install the venting termination according to the diagrams and instructions below.

Comply with the exhaust clearances found in the Rinnai Operation and Installation Manual.

Only one appliance can be attached to the vent system.

Install the system in according to the Centrotherm installation instructions.

Use the 3"/5" concentric to twin pipe adaptor and 3" diameter venting.

The vent termination and air intake must be in the same pressure zone.

Do not exceed maximum straight vent length with number of elbows as shown in the tables on the next
page.

Maintain the clearances shown in the figures below.
WARNING
16
DO NOT use cellular core PVC, CPVC, Radel, ABS or Galvanized ducts as venting
materials.
Vertical Termination
Horizontal Termination
KB Series Manual
5"
Vent
11
"
Intake
Optional