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Rinnai Tankless Water Heater Installation and Operation Manual
4.5.3 Direct Vent (Indoor): Concentric Pipe
Approved Vent Manufacturers and Products
Following is a list of vent components and terminations for Direct Vent installations. Install the correct venting
for your model according to the venting manufacturer’s instructions and the guidelines below. The information
below is correct at time of publication and is subject to change without notice. Contact the vent manufacturer
for questions related to the vent system, products, part numbers and instructions.
Manufacturer
Phone
Web Site
Ubbink
800-621-9419
www.rinnai.us
Heat-Fab
800-772-0739
www.heatfab.com
Metal Fab
800-835-2830
www.metal-fabinc.com
Table 8: Approved Vent Manufacturers
Table 9: Approved Vent Products
Manufacturer
Manufacturer
Part number
Product
Description
Diagram
Horizontal
Vertical
Equivalent
Length (ft)
3 in. /5 in. CONCENTRIC VENT TERMINATIONS
UBBINK
223181
223182
Termination Kit 11.5 in.
Termination Kit 21 in.
10
223184
Wall Terminal 21 in.
5
223187
21 in. Non-Condensing Horizontal Termination
Diverter Kit
16
224046
Raised Horizontal Termination Kit (Snorkel)
24
184118-S
184119
Roof Discharge Termination 18 in.
Roof Discharge Termination 38 in.
5
HEA
T-
FAB
SC03HT
Horizontal Termination Adapter
20
SC03VT
Vertical Termination Adapter
20
MET
AL
-F
AB
3CGRLSV
Vertical Adapter
1
3CGRLSH
Horizontal Adapter
6
3CGRVT
Vertical Termination
5
3CGRHT
3 in. x 5 in. Vertical Termination Cap Kit-Concentric
16