Ecoal – Low CO₂ Smokeless Fuel Ecoal5 is a low CO₂, smokeless coal designed for multi-fuel stoves and open fires. Made from 50% crushed olive stones—a natural by-product of olive oil production—combined with anthracite, Ecoal is an eco-friendly fuel that is easy to light and produces a long-lasting, attractive glow. Its large hexagonal shape promotes excellent airflow, making it ideal for both open fires and multi-fuel stoves. Certified Ready to Burn, Ecoal may come at a higher price than standard fuels, but it offers extended burn times and high heat output. In practice, you’ll use less fuel compared to traditional coals and logs, making it an efficient and environmentally conscious choice.