Installation and Operation Manual
Rinnai Tankless Water Heater Installation and Operation Manual 37
1. Direct Vent (Concentric Pipe)
air
Exhaust
air
Insi de
Co r ne r
12 in.
(0.30 m)
12 in.
(0.30 m)
60 in. (1.52 m) ver�cally
between terminals
60 in. (1.52 m)
Note: 24 in. (0.61 m)
to wall or parapet
12 in. (0.30 m)
Figure 23: Concentric Pipe
Figure 24: Between terminals at
dierent levels
Figure 25: Between terminals at same
level
Figure 22: Concentric Pipe Termination Clearances
Corner