Big news! Rinnai engineers in Japan have just developed the first ever fully engineered Hydrogen Hot Water Heater that produces 0% carbon emissions. It’s a world first and another important step on our journey towards a more renewable future.

After many years developing gas appliances, like our Rinnai INFINITY water heaters, we learned how to get the best out of both combustion and fluid control technologies. By using this deep knowledge, we were able to create a water heater powered by 100% hydrogen. Our Rinnai INFINITY units already accept 20% hydrogen but this is so significant because hydrogen’s a highly sought-after clean fuel source with zero – yes, zero – CO2 emissions. So the more we can use the better.


We’re ready for a renewable future.


Managing Director of Rinnai New Zealand, Ray Ferner, says the hydrogen concept model is a game-changer for the Infinity market. It also means Rinnai is ready to offer continuous hot water systems for New Zealand homes and businesses as soon as the hydrogen market and regulatory standards are established.

“We all need to take action to create a sustainable future.”

“While there is further work to be done, this is a critical step towards a zero net carbon future and the start of bringing to market proven household gas appliances that can run on totally renewable gas."

"We all need to take action to create a sustainable future. With R&D innovation at the heart of our business, we have been working on the next generation of gas appliances to do our part and give people the safest and best climate control and water heating solutions that run on 100% renewable gas.”

New Zealand is aiming for net zero CO2 emissions by 2050 and GasNZ Chief Executive, Janet Carson, says renewable gases are key to achieving a net zero energy system.

She says, “Continuous hot water systems are the most widely sold residential gas appliances in New Zealand.”

“This innovation is ahead of its time.”

"For hydrogen-burning water heaters, the spread of hydrogen infrastructure is a prerequisite for achieving carbon neutrality."

Carson continues, “This innovation is ahead of its time. While Rinnai has developed hydrogen combustion technology for water heaters, Aotearoa doesn't have the supply and infrastructure yet to connect the product."

“This means it will take a while before we see this in Kiwi homes; nevertheless when the right hydrogen gas infrastructure is ready, the industry is ready!”

We plan to start demonstration tests in Australia. From there, we’ll continue to enhance the technology for mass production in line with the spread of hydrogen infrastructure around the world.

“Defining a gas transition pathway is a key action from the Government’s Emissions Reduction Plan. When this work is complete next year, we can expect more renewable gas trials in our country as well as abroad,” Carson says.


We can’t wait for the next chapter of this story to unfold and we’ll keep you up to date with all the latest developments. Simply follow our social channels for more information, plus all the latest from the world of Rinnai.

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