A couple of decades ago, most private house owners opted for gas heating systems for the sake of convenience, and looking at the projected gas prices for this winter, many are now feeling very anxious. The current situation appears more promising for those homeowners who, to this day, still have the option of heating their homes with wood-based fuels alongside their gas heating. However, how does one choose the most suitable option? Is cheaper better, or should one pay more attention to the energy efficiency of the fuel before considering the price? (...)