Charcoal industry has recently regained its spotlight, along with other renewable resources, as one of the tools for Climate Change mitigation, rather than the ill repute as a cause of deforestation. In this paper a study with an experimental evaluation of a charcoal production technology is carried out in an industrial facility. The investigated technology is a state-of-the-art continuous operation automated retort which comprises a monitoring system continuously registering process characteristic temperatures. The raw material, biomass, passes through three different stages in the retort - biomass heating and drying, biomass carbonization, and charcoal cooling. These process sections are described and analyzed according to the relevant temperatures. The obtained data is processed using Statgraphics Centurion Statistical data analysis too. This study draws attention to the importance of scientific approach to charcoal production with optimized process parameters directing the charcoal industry towards an increasingly sustainable production.