Sammendrag
In this paper we present recommended revisions of emission factors for Norwegian wood stoves. Emission factors exist for a number of emissions to air, and vary in a wide range between individual studies depending on the technology, operating condition and fuel studied. This is a challenge when authorities need to decide on emission factors for inclusion in national emission inventories. In these inventories, emission factors need to be representative on a national level and include firing habits and technology in use. Herein lies a considerable challenge, resulting in large uncertainties for a number of the emission factors. In addition, value chain analysis is becoming increasingly common to assess the influence of the different elements in the value chain on different impact factors or stressors. For the wood stove value chain, the conversion element, i.e. the combustion process and the resulting emissions, is most important for most of the impact factors. It is essential for the outcome of such analyses that the best available emission factors are used to be able to assess the current impact of these as well as the improvement potential. Hence, it becomes increasingly important to select or derive representative emission factors, at a sufficient detailing level. In this work, recommended emission factors for wood stoves to be used in Norwegian value chain analysis are proposed.