This double-wall insulated chimney made of acid resistant steel has been designed for extracting combusting gases from gas- and oil-fired boilers. The system is to be used when there is no standard ceramic chimney available in a place where a boiler has been installed and the construction of such chimney is impossible or unprofitable because of construction reasons. The Inner duct is made of 1.4404 acid resistant steel, 0.5 or 0.6 mm thick. The outer casing is made of 1.4301 stainless steel, resistant against weather conditions. The space between the protective casing and inner pipe is filled with high-temperature resistant wool. Details are plasma-arc welded. Guarantee: 5 years.

This double-wall insulated chimney made of heat resisting steel has been designed for extracting combusting gases from wood-fired heating equipment. The system is to be used when there is no standard ceramic chimney available in a place where a boiler has been installed and construction of such chimney is impossible or unprofitable because of constructional reasons. The inner duct is made of 1.4828 acid resistant steel, 0.8 mm thick. The outer casing is made of 1.4301 stainless steel, resistant against weather conditions. Space between protective casing and inner pipe is filled with fireproof matting. Details are plasma-arc welded. Guarantee: 5 years.