The International Comfort Products 1193891 6-Cell Primary Heat Exchanger is a furnace component designed to transfer heat from combustion gases to the circulating indoor air without allowing the two streams to mix. It uses six heat exchange cells to absorb and distribute heat as the furnace operates, supporting efficient heating performance. This component is used in compatible gas fu... https://www.partshnc.com/1193891-international-comfort-products-primary-heat-exchanger-6-cell