Ecoal 25kg Low CO2 smokeless coal for open fires and multi-fuel stoves. Homefire Ecoal produces less smoke, less C02 more heat and lasts longer than either coal or wood. It is made using crushed olive stones, a natural waste product from olive oil production which are replenished every year without chopping down trees. This smokeless eco fuel is easy to light and long lasting, and burns with an attractive flame. Ecoal has been designed for use on open fires and multi-fuel stoves, where its larger hexagonal shape (75 x 40mm) promotes air flow resulting in attractive flames and loads of heat. Thanks to its high and sustained heat output, burning Ecoal50 can work out cheaper than burning house coal or kiln dried firewood, because whilst individual bags are more expensive, you use less for the same heat.