17
Rinnai CVent
Maximum Equivalent Vent Length
In the table below you find the maximum equivalent pipe length of the exhaust and intake venting.
When determining equivalent exhaust and intake vent lengths add:
•
6 feet for each 90° elbow
•
3 feet for each 45° elbow
•
Add any vent extension lengths which are added within the header
due to increased spacing of the water heaters
•
Header kits have already been counted and do not need to be added.
*Approved exhaust and intake diameter is 8”.
Tankless Rack System (TRS) Venting Configuration Summary (PPTL & PPS)
TRS Configuration
Minimum Equivalent
Vent Length (Ft)
Maximum Equivalent
Vent Length (Ft)
Approved C-Vent Configuration
Tankless Models
# of
Tankless
Units
Exhaust*
Intake*
Exhaust*
Intake*
Vent Option
Exhaust
Position
C199i
(REU-KBD3237FFUDC-US)
8
O
n
e E
lb
o
w
+ T
er
mi
n
atio
n
Appliance
Adapter
41
Appliance
Adapter
Room Air
Configuration
Vertical
Only
7
80
2 to 6
100
8
9
41
41
Parallel Pipe Configuration
(Different Pressure Zone)
(Page 23)
7
80
80
2 to 6
100
100
C199i
(REU-KBD3237FFUDC-US);
RUC98i
(REU-KBD3237FFUD);
RU98i
(REU-KB3237FFUD-US)
8
15
41
41
Vertical or
Horizontal
Parallel Pipe Configuration
(Same Pressure Zone &
Face the Same Direction)
(Page 23)
2 to 7
100
100
Vertical Termination
There should be a minimum of 36” between exhaust and
intake terminations.
CVent Termination Clearances
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.
Vent termination per ANSI Z223.1/NFPA 54. For
clearances not specified in ANSI Z223.1/NFPA 54,
clearances are in accordance with local installation
codes and the requirements of the gas supplier.
12” OVER MAX.
SNOW LEVEL OR
24” WHICHEVER
IS GREATER
INTAKE - PVC
EXHAUST - PPTL/PPS
36” MINIMUM INSIDE
EDGE TO INSIDE EDGE
Summary of Contents for c199i
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