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15 February 2019

Rinnai condensing hot water heater units using LPG are said to 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, according to Rinnai who say 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.

Infinity

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. 

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.

Picture: The Rinnai Infinity 55i.

Article written by Brian Shillibeer | Published 15 February 2019

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