Installation Guide

18 KBD Series Manual
 Comply with the exhaust clearances found in the Rinnai Installaon and Operaon Manual.
 Only one appliance can be aached to the vent system.
 Install the system in according to the Centrotherm installaon instrucons.
 The vent terminaon 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 in the following
secon.
 Maintain the clearances shown in the gures below.

The following vent materials are for use with this appliance:
 Cellular core PVC/CPVC
 Radel, ABS, and/or Galvanized ducts.
Failure to use approved vent materials can result in property damage, personal injury, or death.

Flue Installaon with Centrotherm Venng (indoor models only)
Install the venng terminaon according to the diagrams and instrucons below.

11”
5”
Intake
Oponal
Vent
Slope horizontal exhaust run towards the water heater 1/4” per foot. slope combuson air pipe towards unit. Be
sure to dispose of condensate per local codes.