Ceramic inner chimney tunnel element has wall with hollow spaces forming offset channels running lengthwise along chimney tunnel, where channel forms half of total wall volume

摘要

The chimney tunnel element has a wall (1) with hollow spaces (2). The hollow spaces are spaced next to each other and form channels running along the length of the chimney tunnel that are offset from each other. . The channel volume preferably forms about half of the total wall volume. The channels may have rectangular or parallelogram-shaped cross-sections