Specification Sheet

Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: [phone] • www.rinnai.us
1 SP-CV-02 (2/13)
COMMON VENT SYSTEM
Features and Benefits
The Common Venng System provides for longer vent lengths and fewer wall or roof penetraons than
convenonal single-unit venng. CVent provides the necessary components for both combuson air and exhaust
and is made by Ubbink, the same supplier for Rinnai's innovave line of concentric venng. CVent ulizes a CSA-
cered and tested polypropylene venng material. The various secons are self locking and sealing and can be
pushed together without use of cement or glue. CVent can only be used with Rinnai’s RU98 condensing water
heaters.
For combuson air venng, Rinnai’s Common Venng System ulizes both CVent components and, if necessary for
extended vent runs, schedule 40 PVC.
The CVent Common Venng System can be used with up to 8 water heaters with a 41 foot equivalent vent length,
however if used with 7 or fewer units, the maximum equivalent vent length extends to 100 feet.
Advanced features include a precision-made check valve to prevent exhaust gases from penetrang non-operang
water heaters, avoiding negave impacts on combuson and reliability, as well as joint sockets designed to prevent
condensate from gathering in gaps and degrading gaskets.
The current version of CVent is made of polypropylene (PPtl) and is only for U.S. installaons.
Model Applicability
The common vent system is CSA cered (ANSI Z21.10.3, Gas Water Heaters Standards) for use only with the
Rinnai tankless condensing water heater RU98i (REU-KB3237FFUD-US).
#790008 CVent Back-2-Back Kit
(Combustion Air & Exhaust)
#790006 Cvent Starter Kit (Back-
2Back or InLine)
#790007 CVent InLine Kit
(Combustion Air & Exhaust)