Specification Sheet

Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: [phone] • www.rinnai.us
7 SP-CV-02 (2/13)
COMMON VENT SYSTEM
CVent Terminaon Clearances
Options for Combustion Air Vent:
•For extended Combustion Air vent runs, PVC can be used between the Intake Header and Termination.
•Use Combustion Air PVC Adapter Kit (Part #: 780037) when transitioning from the PP intake header to
extended PVC combustion air vent runs. .
The materials described below can only be used on the combustion air vent. The Ubbink Polypropylene CVent can
be used on both the combustion air and exhaust. Field supplied PVC/CPVC material can only be used on the
combustion air side and MUST NOT be used for the exhaust.
Intake Material
Vertical Termination
There should be a minimum of 36 inches between exhaust
terminations in multiple common vent installations.
Clearances of Brackets
All supports such as wall brackets on the
external façade or spacer blocks in a
shaft must be assembled in a maximum
distance of 78 in (2 m). Where there is a
bend, additional spacer blocks or wall
brackets can be planned before and after
the bend, depending on the local
situation.
Freestanding Components
Components, which are assembled
freestanding vertical (roof termination)
with a length of more than 59 in (1.5 m),
must, depending on the amount of wind
and snow level expected, be additionally
secured to the building with guys or
braces.
12” OVER MAX.
SNOW LEVEL OR
24” WHICHEVER
IS GREATER
INTAKE - PVC
EXHAUST - CVent
36” MINIMUM INSIDE
EDGE TO INSIDE EDGE
Approval Codes for Installation
Item Description Flue Material United States
Plastic Vent and/or combustion air
components
PVC Schedule 40 ANSI/ASTM D1785
PVC - DWV ANSI/ASTM D2665
CPVC Schedule 40 ANSI/ASTM F441
Plastic pipe cement and primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493