Noritz water heaters, N-0842MC (NRC111) models that we are
going to review here are tankless gas appliances new generation, that
are using an innovative water heating technology. With specially
designed elements, Noritz tankless water heater utilizes the flue
energy to preheat incoming water and therefore increase its performance
and efficiency to over 93%.
They are known as condensing water heaters. Condensing boilers
are very popular in Europe, and now thanks to Noritz are offered to
users from North America. Like other Energy Star devices you can also
take the advantage of the government tax credit.
is special about Noritz condensing design?
Noritz water heaters with the condensing technology has the
main part adual heat exchanger that is consisted of the copper and
stainless steel heat exchanger. Durable stainless steel element is
added to capture the residual exhaust heat and exchanges it with
of Noritz water heaters with condensing technology
Thanks to this innovative condensing technology there is a
significant reduction in greenhouse gases and increased efficiency.
Temperature of the exhaust gases is about 400 F (204 C) and
once it transfers the heat to incoming water, the temperature of
exiting flue gases drops to 120 F (49 C). As the flue gases have lots
of moisture, condensation occurs; the drain pipe should be installed
for water discharge.
The outgoing flue gases temperature is lower, so instead using
stainless steel pipes you are allowed to use much cheaper PVC for
venting. With the built-in PVC adapter it is very easy to install
Noritz water heaters by having a lower minimum gas input,
11,000 BTU per hour, outperforms competitors as it controls much better
and accurately hot water temperature, when it is working with a low
And with a maximum power of 199,000 BTU/h, N-0842M (NRC111)
condensing models can provide higher water temperature of 180 F (82 C)
than Navien manufacturer, for example.
Noritz condensing appliances are factory set on 120 F, but you
still have 14 options to set the output temperature between 100 and 180
F. You can also set the temperature of water that comes out of the hot
tap using a remote controller (included with heater purchase).
a dual burner and corrosion resistant heat exchanger technology, Noritz
water heaters, condensing models are able to increase the efficiency
and keep the temperature fluctuation in low +/-3 F.
Not only that N-0842MC (NRC111) models can be used for the
potable water heating but also for space heating, thanks to the
combi-system set-up feature.
Either using propane or natural gas, the efficiency is still
over 93%. With a max capacity range of 11.1 gallons per minute,
models are ideal for multiple bathroom homes; up to 4 applications
simultaneously can be used (i.e. two showers, dishwasher and washing
Features - Summary
Over 93% efficiency level with a new condensing technology
Dual flame burner for minimal hot water temperature
Dual heat exchanger, one made of copper, second from
Modulating gas valve for automatically burner output
Turbo Flow system for high demand applications provides
Multi System allows up to 24 water heaters to be linked
Quick Connect cable allows connection of two identical
units and for easy control with a remote control.
Self diagnostic on board computer system, great for
troubleshooting and repairs
Suitable for installations up to 4500 ft or 1.5 km above
Thermal fuse provides an automatic protection from
Freeze-prevention heater works automatically if power is
Pressure relief valve
Lightning prevention device
Fan rotation detector
Resin coated PC board
Automatic air regulator monitors an internal temperature
Built-in neutralizing system for condensation
Isolation valves with pressure relief valve - allows easy
flushing and full diagnostic testing.
Multi-system controller is required when connecting over 3
ScaleShield is Noritz brand water softener protects; from
lime and mineral build up.
Remote controller outdoor junction box, necessary when
Based on the venting options there are two condensing, wall hanging
Noritz water heaters, you can choose from. Both of them are power
vented, where flue gases are forced out and fresh air from outside draw
in. As N-0842M (NRC111) models are combustion sealed the inside air is
protected from being used.
N-0842MC (NRC111-SV) is tankless model that can be installed indoor and
outdoor, and vented horizontally or vertically. When installing inside,
sufficient air supply should be provided as it is using the inside air
for combustion and one flue pipe for product of combustion extraction.
It is important to drain condensate securely and not to block the
drainage, especially if installing inside. Significant amount of
condensate is extracted, around 2 gallons per hour and what is left
from the moisture in the flue it usually produces a white steam at the
vent discharge terminal.
Once installed outside, Noritz outdoor model can be exposed to lower
freezing temperatures. That is why you should not remove the power plug
from the electrical outlet. The freezing device protects the unit only,
not plumbing. For extremely cold weather and if the unit is not used
for a while, the best solution is to drain the whole unit.
For vertical roof vent penetration, recommendation is to use a rain cap
at the end of the vent.
Birdscreen is an option for both horizontal and vertical vents, a
solution that keep birds from entering inside the vent pipe.
N-0842MC (NRC111-SV) models cannot be used in RV, boat or mobile and
manufactured home applications.
N-0842MC-DV (NRC111-DV) units are wall-mounted and power
vented, built for indoor installation only. These models can be used
for residential, commercial and in manufactured home applications, but
not in RVs or boats.
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