| 摘要 |
A cast iron or aluminum sectional boiler, in particular a condensing boiler, having generally annular sections, one front section, one cover-like rear section and at least one center section being provided which form a furnace chamber having generally surrounding heating gas passages, and their annular water compartments are connected to one another via hubs. The sections have one lower return connection and one upper feed connection as well as at least two anchor rods for holding the section block together. The cast iron or aluminum sectional boiler is optimized with respect to compactness and robustness. Annular gaps are in each case provided as heating gas passages between two adjacent sections, each of which, starting from the furnace chamber, runs approximately radially outwards and leads into an exhaust gas collection chamber on the outside of the sections.
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