OEM Lennox Heat Exchanger Assembly — 16U72

The genuine OEM Lennox 16U72 heat exchanger assembly moves heat from your furnace's burners into the airstream that warms your home, all while maintaining an airtight barrier between combustion byproducts and the air you breathe. Manufactured to Lennox factory specifications, this assembly delivers the correct airflow path and thermal performance your gas furnace was designed around, protecting both comfort and efficiency.

Watch for warning signs of a compromised heat exchanger: visible cracks or rust, soot or scorch marks, a distorted or yellow burner flame, strange smells during operation, or a triggered carbon monoxide alarm. Because a breached heat exchanger can leak flue gases into living spaces, it is a safety-critical part that must be replaced at the first sign of failure.

OEM is non-negotiable for this component. The Lennox 16U72 uses the precise metal alloy, thickness, and forming that resist the thermal-stress cracking that plagues generic parts. Installing the factory-original assembly preserves your furnace's combustion safety, keeps your warranty intact, and returns the unit to its rated heating capacity and efficiency.