In May 2022, Rinnai introduced a hydrogen-powered water heater: the only by-product of the burning gas is water, and when it burns heat is generated, and the water absorbs the energy to boil it.

The company has also launched an initiative under which it intends to offer a range of carbon-neutral solutions to the general public in the coming years. However, they did not want to be alone, but were looking for partners for further development. They are joined by Toyota and the smart city project of the Japanese brand Woven City, where residents will be able to test the technologies of the future under real conditions.


Since the boiler was already a given, they first aimed at cooking during their cooperation, with which the many advantages of the home use of hydrogen could be demonstrated in an amazing way. Examples include comfort, an already known principle of operation and proper efficiency, as well as environmental awareness.

Instead of gas and electric stoves, we can cook with this in the kitchen of the future 2

Not only are researchers experimenting with safer and more environmentally-efficient methods of burning: with new technologies, the perfect taste and texture of food are equally important, whether it’s baking or cooking. For optimal texture and consistency, controllability and predictability are the most important, but in some cases it is also important that the temperature of the medium to be heated changes rapidly. We currently get it for gas and electric stoves, and the goal is for the hydrogen system to work the same way.

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“Current cooking technologies emit so much carbon dioxide that most homes use propane or other gases for energy for this purpose, or use grid-powered electrical appliances, which are also essentially polluting,” James Kovner said. Toyota Board Member. Noting that preparing food using hydrogen could be a more environmentally friendly process.