Three=way heat exchanger

摘要

The U-shaped container portion of a three-way heat exchanger (1) are inserted into each other and are outwards sealed by a cover plate (6) and sidewalls. The medium heat exchanger is simply dismountable for cleaning purposes. The two other heat exchangers (2, 3) have additional outlet openings (4, 5) in their lower region for water draining. Thus the thermal energy of the main medium, i.e. flue gas, is transferred to a return to pre-heat water and fresh air for burner combustion air.