The Lennox 23X27 – 624349-05 stainless steel heat exchanger is a genuine OEM replacement component engineered for compatible Lennox gas furnaces with a 180,000 BTU heating capacity. This heat exchanger is the core of the furnace heating process, safely transferring heat from combustion gases to the air stream while keeping exhaust byproducts isolated from circulated indoor air. Manufactured to exact Lennox specifications, it restores original heating performance, efficiency, and safety when replacing a worn or failed exchanger.

Constructed from high-quality stainless steel, this heat exchanger offers enhanced resistance to corrosion, thermal fatigue, and long-term stress caused by repeated heating and cooling cycles. It is designed for precise fitment, reliable operation, and long service life in demanding residential and light commercial heating applications.

 

Specification:

Manufacturer: Lennox
Part number: 624349-05
Lennox catalog number: 23X27
Product type: Heat exchanger
Material: Stainless steel
Heat output rating: 180,000 BTU
Application: Gas furnace heat exchanger replacement
Compatibility: Designed for specific Lennox furnace models requiring a 23 x 27 stainless steel heat exchanger
Condition: New, OEM replacement part

This Lennox stainless steel heat exchanger is intended for professional installation and is ideal for HVAC contractors and service technicians performing furnace repairs, refurbishments, or preventive maintenance. Using an OEM Lennox heat exchanger ensures proper airflow, safe combustion, and long-term system reliability compared to aftermarket alternatives.

Ideal for restoring furnace efficiency, meeting manufacturer specifications, and maintaining safe heating operation in high-capacity HVAC systems.