A significant proportion of pollutants arise from the heat production equipment in private households. The processes of combustion and product treatment (drying, adding chemical compounds) generate aggressive gas flows containing solid particles (SPs). Common methods employ high-efficiency gas purification to remove SPs, the most popular include electrostatic and sleeve-type filters. However, the operation of these types of filters is complex, and thus their application is very limited. This is especially evident when collecting adhesive and wet FSPs or when purifying aggressive gas flows. New design multi-channel cyclone has a few principal elements of the structure such as secondary inlets, inner slits and convex bottom. These improvements allow to avoid an adhesion of sticky and moist SPs on the inner surfaces of the cyclone. This study focuses on estimating the effect of separating wood and wood ash SPs. The obtained results are presented and the comparison of the advantages and disadvantages of two different design multi-channel cyclone are provided. (C) 2019 Elsevier B.V. All rights reserved.