Biomass is organic, meaning it is made of material that comes from living organisms, such as plants and animals. The most common biomass materials used for energy are plants, wood, and waste. These are called biomass feedstocks. Biomass energy can also be a non-renewable energy source.

Pellets are produced by compressing the wood material which has first passed through a hammer mill to provide a uniform dough-like mass. This mass is fed to a press, where it is squeezed through a die having holes of the size required (normally 8 mm diameter, sometimes 10 mm or larger).

This means they produce low emissions and trouble-free heating with high energy value. Wood pellets are one of the most eco-friendly forms of solid wood fuel available. They create almost no ash when being burnt, and are renewable (sourced from sustainable woodlands) so will not run out. This means they produce low emissions and trouble-free heating with high energy value. Wood pellets are one of the most eco-friendly forms of solid wood fuel available. They create almost no ash when being burnt, and are renewable (sourced from sustainable woodlands) so will not run out.