Designed and dimensioned using advanced fluid dynamics software, the Famar-patented heat exchanger features a specialized finned structure with multi-pass smoke circuits. Automatic Bypass: The flow of smoke into the chimney or the "dry chamber" heat exchanger is managed automatically via a bypass valve. Engineered for High Heat: Specifically designed with long, narrow passages and centrally pinned fins to ensure the internal walls reach extreme temperatures. Secondary Combustion: The incandescence of the internal contact surfaces burns off unburned particles carried by the smoke. This process transforms residues into ash, which settles on the internal surfaces due to a cyclone abatement effect. Maximum Efficiency: This thermal cycle recovers additional energy that would otherwise be lost, transferring it directly to the water for a higher overall yield.