Pollutants from combustion in wood-burning stoves are influenced by many factors, including the exhaust gas system. This is responsible for the air supply due to the draught generated. Contrary to results reported in literature the experiments in this study show no effect on temperature related to increasing air supply and a total dust decreasing at higher draughts. The results also show no significant impact of the draught on gaseous emissions (CO/OGC/NOx). The most significant loss was determined at thermal efficiency, which lost up to 13 % absolute with increasing draught.