The Trane EXC1156 Heat Exchanger is a replacement heating component designed for compatible Trane gas furnaces and residential HVAC systems. It transfers heat from the combustion process to the circulating air while keeping combustion gases separated from the indoor airflow for safe operation. Engineered for durability and efficient heat transfer, this heat exchanger improves heating ... https://www.partshnc.com/exc1156-trane-heat-exchanger