Natural substances are the by-products of bio-alcohol combustion:
carbon dioxide (CO2) and water vapor.
These substances are in the air we breathe. The bio-fuel is thus considered neutral as far as the formation of CO2 is concerned
The amount of CO2 produced in combustion is comparable with several candles burning or the air exhaled by 8-10 people. About 0.2 liters of water is produced per hour.
(drawer with regulation unit - proprietary EU 674114-0002)