A hydrogen-ready boiler is a gas-fired heating boiler which is capable of burning either natural gas or pure (100%) hydrogen. Hydrogen-ready boilers are the key to enabling conversion of the existing gas distribution networks from natural gas (which is mostly methane) to hydrogen.

Hydrogen is a carbon-free energy carrier and combustion of hydrogen produces no carbon dioxide at the point of use.

Hydrogen can be manufactured from water using electricity as a renewable energy source, or from natural gas accompanied by carbon capture and storage. Recent work, such as the H21 Leeds City Gate study, has shown that conversion of UK gas distribution networks is feasible and could help to decarbonise the heating of buildings. A hydrogen-ready boiler is intended to provide a like-for-like replacement for an existing natural gas boiler. The boiler can be quickly and easily converted to burn hydrogen at the time when the local network switches over.