A system for drying a load of wood including: a heat generating device providing heat necessary for drying the load of wood, apparatus for generating a gaseous coolant flow for treating the load of wood by combustion of biomass under O2, the gaseous coolant flow being essentially constituted by CO2, a heat exchange device allowing the transfer of the heat produced by the heat generating device to the gaseous coolant flow for treating the load of wood, a unit for treating/drying the load of wood, including a central volume, known as a technical or treatment volume, dedicated to the drying of the wood, and inlet and outlet hatches for the loads of wood, situated at the upstream and downstream ends of said central volume, and a thermal device for the dehydration and condensation of the steam extracted from the wood during the drying cycle.