Residential biomass combustion is a major source of PM2.5 and SLCP (Short Lived Climate Pollutants) emissions in Denmark, Finland and Sweden. SLCPs and PM2.5 have impact on climate, environment and health. When developing strategies for reduced emissions, reliable information on current emissions and assessments for how they can be reduced is essential. This report presents recommendations for how to further improve national activity data collection procedures for less uncertain emission inventory results. It also presents scenario results with estimated technical potentials for reduced emissions of SLCPs and PM2.5 from residential biomass combustion, transformed into potential impact on health and climate effects in 2035.