The Lennox 16U76 Heat Exchanger Assembly is a genuine OEM replacement component designed for select Lennox gas furnaces. The heat exchanger is the core safety and performance component of the furnace, responsible for transferring heat from the combustion process into the air stream while keeping combustion gases isolated from the conditioned air. Replacing a failed or cracked heat exchanger with an original Lennox assembly restores proper heat transfer efficiency, safe operation, and factory-level reliability.

Manufactured to Lennox engineering standards, this complete heat exchanger assembly is built for precise fitment, long service life, and dependable performance in residential and light commercial heating applications. It is intended for professional installation and is commonly replaced due to age-related wear, corrosion, or heat stress identified during furnace inspection.

This is a direct OEM replacement part and should only be installed in compatible Lennox furnace models. Model and serial number verification is strongly recommended prior to ordering.

 

Specifications:

Manufacturer: Lennox
Part number: 16U76
Product type: Heat exchanger assembly
Application: Gas furnace heat transfer and combustion isolation
Construction: Factory-assembled heat exchanger components
Installation: Direct replacement, professional installation required