CO2 emission is a worldwide problem and in the attempt to reduce these emissions, renewable energy sources may be considered serious alternatives to the present usage of fossil fuels, As part of a research programme financed by the Danish Energy Agency, data concerning the different heating technologies based on oil and wood fuels have been collected, Private and social costs are estimated and these economic data are used when analysing regional income effects of increased consumption of fuels (e.g. wood) locally produced, The impacts on income and tax revenues are calculated from multiplier expressions, constructed with rights to the measurement of local effects.