Rinnai RU98 Water Heaters Review

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Rinnai RU98 tankless and condensing water heaters for ultra
efficient water heating. How RU98 is utilizing the latest advanced
technology to maximize the efficiency and comfort.

Models review

Rinnai RU98 tankless water heaters are designed as
the indoor
RU98i and outdoor RU98e units, both using two exchangers and the
condensing technology, which results in the extremely high energy
factor of 0.95, either using natural gas or propane. The
heaters belong to the "Ultra" series, a models with the largest
capacity and recommended for homes with up to
four bathrooms.

With the purchase of any Rinnai Ru98 model, you will get the
warranty of 10
years on the heat exchanger or 12 if the
isolation valve kit is installed.

Rinnai Ru98i

Rinnai RU98i model can be installed indoor only and thanks to
its direct
vent system and sealed combustion chamber it gets enough air
for
combustion while it safely removes the exhaust gases outside.
The
Rinnai RU8i models are designed to use either concentric (pipe within
the pipe) system or two pipe system that runs horizontally through the
outside wall or vertically through the roof.
Since the exhaust gases are released with the lower temperature than
the typical non-condensing model, cheaper vent pipes are used (PVC or
CPVC).

Every indoor unit has the digital temperature controller built
in.

Rinnai RU98e

Rinnai RU98e doesn't require pipes for the air intake or
exhaust as
they are already installed outside. The digital temperature controller
is not built-in but it is provided with the unit.

Where to buy

You can buy Rinnai RU98, either
outdoor or indoor type, also natural gas or propane gas unit for approximately $1300 to
$1400. All units have great customer reviews which is
between 4 and 5 stars.

Features review

• Direct electronic ignition eliminates the need for the
  pilot light.

• Ultra Low NOx burner complies with the 20 ppm
  NOx emission
  levels.

• Digital temperature controller MC-91-2US shows the hot
  water temperature and if the problem appears, the error
  codes.

• Enhanced scale detection.

• Built-in Rinnai Circ-Logic
  recirculation program, which recirculate water in two modes: Economy
  and Comfort, in residential applications.

• Hot water temperature lock, which prevents accidental or
  intentional
  temperature changes.

• Water flow sensor, electronic water control device and
  electronic by-pass control.

• Safety features for the flame and boiling
  protection, combustion fan check, remaining
  flame OHS, automatic frost protection (protects the unit when the
  outside temperature is up to -22 F)...

• Diagnostic systems helps in service.

• PC board.

Specifications - Technical Data

Models --- Specifications	RU98i	RU98e
Gas Input (BTUs)	15,200 - 199,000	15,200 - 199,000
Water Flow (GPM)	0.26-9.8	0.26-9.8
Energy Factor EF	0.95	0.95
Activation rate (GPM)	0.4	0.4
Temp. settings (F)	98-140	98-140
Electric consumption (Watts)	64	63
Max. vent length (ft)	41' - one pipe system 42' - two pipe system	N/A
Altitude height (ft)	10200	10200
Size (inch)	18.3x26x10	18.3x26x10
Weight (lbs)	61.7	61.7

(Photo credit to Rinnai)