No! The Aston fireplace runs on bioethanol, one of the cleanest-burning fuels available. Unlike wood or gas fireplaces, it produces no smoke, soot, ash or harmful toxins.
The only by-products are a small amount of water vapor and a tiny amount of CO₂, even less than a candle.
Bioethanol burns so cleanly that no flue, chimney or ventilation system is needed.