Noritz NRC711 Series Review

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Review of the Noritz NRC711 indoor and outdoor models from the
ecoTough series utilizing natural gas and
propane, designed for heating potable water in residential
applications.

Models review

Noritz NRC711 tankless water heaters are high
efficiency and fully condensing home appliances, designed with the OD
vent type for the outdoor and DV (or SV) vent type for the indoor
installations,
and are recommended for use in homes with maximum 3 baths.

Due to its
small and compact size, and its ability for the wall
installation, they are great choice for those homeowners who are
struggling with the home floor space.

When comparing both models, side by side: Noritz
NRC711-OD is easier to install as it doesn't require
the vent
pipe... it is ventless. This model is the power vented model that uses
the slotted opening to remove the flue gases and perforations on the
front
panel for the air intake. On the other side, the indoor model which is
also power vent, requires
3" PVC pipe for the safe extraction of the flue gases (it can use
2-pipe DV or a single vent). The indoor unit is also a bit taller and
heavier than the outdoor unit. The noise rating of 51 dB is lower on
the Noritz
NRC711-DV unit than NRC711-OD with its 55 dB.

Most
of the features between these two models are common, so as the
technical data; BTU input range, energy factor, minimum and maximum
water flow rate, and temperature settings.

A neat feature is the built-in display window located at the
front of the
unit allowing you to see when the power is ON, when the gas burner is
ON, when the hot water flows or the error code during the
failure.

Unfortunately, the remote controller, which provides more
flexibility
and convenience is an optional accessory. Either model can work only as
a single unit as they are not quick-connect compatible, but are
recirculation compatible for fast hot water delivery.

Features review

• Single burner.

• Primary heat exchanger made of copper and secondary made of
  stainless steel.

• Direct electronic ignition for greater reliability.

• Power direct and non-direct venting, using PVC and CPVC
  pipes.

• High efficiency condensing technology.

• Remote control for easy temperature control and
  adjustment, including flow rate and advanced diagnostics.

• Temperature adjustments from 115 to 140F in 6
  settings (remote controller or dip switch).

• Low NOx gas combustion.

• Safety
  features include; freeze protection to -4F for the outdoor unit and
  -30F for a DV model; flame sensor, overheat prevention device, fan
  rotation detector, lightning protection device, thermal fuse,
  temperature lockout and electric ignition.

• Standard 3/4" gas and water connections.

• 12-year warranty on heat exchangers and 5 years on other
  parts, for the residential applications.

Specifications

Models --- Specifications	NRC711-DV	NRC711-OD
Gas Input (BTUs)	15,000 - 157,000	15,000 - 157,000
Water Flow (GPM)	0.5-7.1	0.5-7.1
Energy Factor EF	0.94	0.94
Temp. settings (F)	115-140 (5F intervals)	115-140 (5F intervals)
Electric consumption (Watts)	71 (NG)	52 (NG)
Max. vent length (ft)	57	-
Size (inch)	24x14x7	21x14x7
Weight (lbs)	41	40

(Photos courtesy of Noritz)