The Almeva DW25 versatile three-layer stainless steel chimney system is suitable for all types of fuels and all types of appliances that operate in both vacuum and positive pressure operation. Wide range of applications: conventional heat appliances, condensing appliances, heating plants, generators, block boilers, emergency units, furnaces. High-quality stainless steel of class 1.4404 and high-quality technical design allows even so-called wet operation — the system is resistant to moisture.