Through the combustion of biomass-derived woody, the boiler allows to realize the transfer of heat to a liquid (water) without the sending its boiling point, with the function of distributing it in an environment. The advantage of using fuel of vegetable origin / organizes allows not only to limit the environmental pollution, but also saves in economic terms. To date Ra.Gio has various models suitable for the treatment of the pellets, wood chips, wood shavings, sawdust and wood products.