Heat is generated through the electrolysis process, in which hydrogen gas is produced in the boiler. This process uses electricity to split water molecules into hydrogen and oxygen gas, using the heat released for heating purposes.

What makes the Greenhot boiler unique is its completely closed system. In this system, the water vapor formed is condensed and returns to the boiler, preventing the creation, storage, or disposal of any new substances. This means that there is no need for external addition of water or chemicals, which makes the system more efficient and environmentally friendly.

Due to this closed combustion process, there are no emissions of NOX gases (nitrogen oxides) and carbon monoxide, which can be harmful to both health and the environment. This makes the Greenhot boiler not only efficient in heat generation, but also particularly clean and sustainable in use.