20
Rinnai Commercial Hybrid System Installation and Operation Manual
Remove and discard screw from
concentric flue connection.
Remove exhaust adapter ring (discard for
concentric venting configurations).
Concentric
Install the concentric vent. Ensure it
is properly seated.
Secure the vent pipe to the concentric flue
connection with the supplied screw.
Concentric Pipe Installation Instructions
Important:
Install the venting termination according to the diagrams and instructions in
this manual. Slope the venting 1/4 in. per foot toward the appliance according to the vent
manufacturer
’
s installation instructions. Dispose of condensate per local codes.
Direct Vent
(Concentric Pipe)
1
2
3
1
4
Concentric Vent Maximum Equivalent Length
Vent Sizes
2 in. X 4 in.
3 in. X 5 in.
Vent Lengths
65 ft (20 m)
150 ft (46 m)
•
45° elbow is equivalent to 3 ft (1 m)
•
90° elbow is equivalent to 6 ft (2 m)
Concentric Pipe Example Vent Applications
Horizontal Wall Terminations
2 in. x 4 in.
3 in. x 5 in.
Vertical Roof
Terminations
2 in. x 4 in.
and
3 in. x 5 in.
Concentric Pipe Maximum Vent Length
