In the year 2015 the standards of emissions for small-scale furnaces in Austria were mitigated and in future the limit values will probably be further tightened. Generally, the emissions of particles have a strong impact on human beings and environment, because they further the eutrophication and acidification of soil and water and on the other hand they have effects on the health of humans and animals. The fine particulate air pollution stimulates the rise of respiratory diseases and pulmonary damages. The small-scale furnaces also further the emission of hazardous substances. To reduce the exhaust emissions different measures are needed. One of them is the installation of downstream dedusting plants. Especially in the last years, different filtersystems for small scale furnaces were developed. To compare the pressure loss, deposition rate and service life in different systems, a testing device was rebuilt to test the several ways of exhaust control under uniform conditions. ^A standard draft DIN SPEC 33999 was the template for this work. It was modified to test different filter systems. On the one hand filtering separators were used, on the other hand also two different electric separators, one a sawtooth electrode, one a wolfram electrode. For filtering we used either insulating material or glass fibre matting. An existing test machine (VDI 3926 TYP 2) was modified to test different separators under defined conditions. The parameters for deposition rates, pressure loss and the quality factor were measured and calculated. As testing aerosol artificially generated soot was used, as well as a mix of soot and wood ashes. The researches executed showed that electric separators have a slightly smaller deposition rate than filtering separators, but the pressure loss in electric systems is far smaller than in any other system. ^So, for the upgrade of existing small scale furnaces electric separators are much more convenient, especially as there is no need for additional bellows in the chimney.