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Rinnai CVent
Description
The CVent Common Venting system provides longer vent lengths and fewer wall or roof penetrations than
conventional single-unit venting. For the exhaust flue, CVent utilizes a CSA-certified and tested polypropylene
venting material from Ubbink, the same supplier for Rinnai's innovative line of concentric venting. The various
sections are self locking and sealing and can be pushed together without use of cement or glue.
CVent is only for use in U.S. installations and is not currently approved for use in Canada.
Model Applicability
The common vent system is CSA certified (ANSI Z21.10.3, Gas Water Heaters Standards) for use only with the
Rinnai tankless condensing water heater
RU98i (REU-KB3237FFUD-US)
.
Installer Qualifications .......................................... 2
Description ............................................................ 2
Model Applicability ............................................... 2
Safety Symbols ...................................................... 3
Warranty and Liability Exclusions ......................... 3
Specifications ........................................................ 3
Parts/Kits ............................................................... 4
Sample Roof Installation ....................................... 8
Sample Horizontal Termination Installation………. 9
Spare Parts List………………………………………………….10
Venting Guidelines .............................................. 11
Maximum Equivalent Vent Length ...................... 12
CVent Termination Clearances ............................ 13
Exhaust Vent Termination Clearances ................ 14
Maintenance Clearances ..................................... 16
Water Heater Clearances .................................... 16
Installation Instructions....................................... 17
Common Header Check valve Maintenance ....... 22
Final Checklist ...................................................... 23
Appendix
Ubbink CVent Assembly Instructions .................. 24
A licensed professional must install the common
venting.
The installer should have skills such as
connecting gas lines, water lines, valves, and
electricity
knowledge of applicable national, state, and local
codes
If you lack these skills, contact a licensed professional.
Installation is certified for sea level (0-2000 feet) only.
For installations above 2000 feet refer to the Rinnai
Installation and Operation Manual for other venting
options.
Installer Qualifications
Table of Contents
Improper installation of the vent system and components, or failure to follow all
installation instructions, can result in serious injury.
WARNING
