Woodsure Certified WS5803/00002. Eco-nugget briquettes are mechanically pressed from virgin-source timber chips and sawdust generated at our onsite mill, located in the heart of East Sussex. 100% of our wood waste is recycled into Eco-Nuggets and other wood fuel products during the manufacture of our machined boards, doors, windows, flooring, skirting and decking, all of which are made from high-quality timbers, typically oak. They have a low ash content and are very clean to handle.