Lennox 84K48 Heat Exchanger Assembly is a genuine OEM replacement component designed for select Lennox gas furnaces. The heat exchanger is a critical safety and performance component that transfers heat from the combustion process into the airflow while keeping combustion gases isolated from indoor air. Replacing a damaged or cracked heat exchanger with an OEM Lennox assembly helps restore proper heating efficiency, maintain system reliability, and ensure safe furnace operation.

This complete heat exchanger assembly is engineered to Lennox factory specifications for precise fitment, long-term durability, and compatibility with approved Lennox furnace models. It is intended for professional HVAC service and replacement applications where original performance and safety standards must be maintained.

 

Specification:

Manufacturer: Lennox
Part number: 84K48
OEM reference: LB-91398D
Product type: Heat exchanger assembly
Application: Gas furnace heat exchanger replacement
Compatibility: Select Lennox furnace models (model and serial verification required)
Construction: Factory-assembled OEM heat exchanger
Installation: Professional installation recommended