The Lennox 14C19 Aluminium Heat Exchanger is a high-capacity heat transfer component designed for compatible Lennox heating equipment with a 240K BTU rating. It transfers heat efficiently between combustion gases and circulating air while keeping the two streams separated, allowing the HVAC system to deliver warmed air safely and effectively. Commonly used in commercial furnaces and c... https://www.partshnc.com/14c19-lennox-alum-heat-exchanger-240kbtu