RINNAI WITH LPG IS LOW
NOX, SUSTAINABLE AND
PERFECT FOR OFF-GRID
Rinnai condensing hot water heater units using
LPG deliver lower carbon emission figures, greater
energy efficiencies and are more economic to run
than other sources such as oil or electric - making
them the first choice for off-grid installations and
sites.
For specifiers and installers, helping an off-grid user
select a low NOx energy efficient water heater is
critical — and a condensing continuous flow water
heater using LPG is one of the most efficient and
environmentally friendly options available. By
choosing a continuous flow water heater instead
of a standard electric water heater, an end user
can reduce energy costs by up to 50% and reduce
greenhouse gas emissions by up to 61%. When
compared with oil-fired systems this saving is even
greater.
Tests show that a Rinnai Infinity condensing water heater emits
35.18mg/kwh NOx compared with a typical oil boiler that emits
approximately 364 mg/kwh NOx. That means a Rinnai condensing
water heater emits approximately 10% of the NOx that an oil boiler
emits, a 90% reduction. Therefore, combining a gas boiler and a
Rinnai water heater will radically reduce NOx.
On the 26th September 2018, the EU introduced new stricter
parameters for NOx emissions in the gas water heater category. The
new NOx level was set at 56mg/kwh. Rinnai water heaters are well in
advance of the criteria demonstrating product quality and superior
performance.
The new criteria for oil fired boilers or liquid fuels
has been set at 120mg/kwh, highlighting that
current appliances and the oil-fired market has
some way to go before it can achieve a similar level
to that of gas.
If we compare the production of CO₂ between gas
and electricity we find that for every GJ (277.78kW)
of energy used gas will produce 44.44kg compared
to 103kg with electric. We can see that for the
same energy used electricity will produce twice the
amount of one of the major greenhouse gases.
The efficiency of this type of electrical generation
is as low as 40%. So, if we now compare the use
of electricity to LPG to heat hot water we find that
electricity is 40% efficient in comparison to a Rinnai
water heater which returns 107% nett efficiency.
Electricity is not the ‘green’ fuel that its marketing portrays it to be. It
produces more CO₂ than LPG but is also less efficient, by far.
An LPG continuous flow water heater is an ‘on-demand’ system.
When a hot-water tap is opened, the unit reads the demand and
starts the heating process. The water flows through a heat exchanger,
where it heats to the desired temperature using only as much gas
as is needed. When the tap is turned off, the heater automatically
shuts off.
For more details on RINNAI products visit www.rinnaiuk.com