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INTAKE CAP
INTAKE AND EXHAUST OPTIONS
EXHAUST
ADAPTOR RING
CONCENTRIC
VENTING
PVC/CPVC/PP
CONFIGURATIONS
Gas Line Sizes — 1/2 in. line not a problem
Rinnai Tankless Water Heaters are designed to always provide maximum
performance and operating eciency using either a ½’’ or ¾’’ gas line, as
long as sucient gas flow is available.
SENSEI™ Condensing models automatically modulate gas input to
maintain combustion if low gas pressure occurs.
Optimized Concentric Venting
for Non-Condensing Models
Rinnai Tankless Water Heaters were the first to use a unique
concentric venting system – featuring an inner tube for exhaust
and an outer tube for fresh air from outdoors. The result is a
direct-vent, sealed combustion system that oers optimum
safety and performance.
Venting available in vertical and horizontal
configurations. Concentric structure allows hot
exhaust to exit through interior tube, while fresh air
enters through the outer layer.
Multiple Venting Options for
Condensing Models
The Rinnai SE and SE+ Series models oer concentric polypropylene
or dual-pipe PVC/CPVC/PP venting options on the same model. The
dual venting configuration on the top allows for maximum flexibility for
installers and dealers — one concentric vent or two PVC/CPVC/PP
pipes can be used for venting.
* Maximum equivalent vent lengths are specific to the fuel type of the RUC and RUR Tankless Water Heater.
Use of elbows in installation will reduce the maximum vent length. It is imperative when performing equiva-
lent vent length calculations that you refer to the Installation Manual and any applicable technical bulletins.
HE+ / HE Series SE+ / SE Series
VENT TYPE RUCS
Concentric PP 41 ft. (12.5 m)
Dual Pipe PP (Centrotherm) 41 ft. (12.5 m)
VENT TYPE RUCS
3 in. Twin Pipe PVC/CPVC/PP (76.2 mm) 41 ft. (12.5 m)
4 in. Twin Pipe PVC/CPVC/PP (10.16 m) 100 ft. (30.5 m)