The Lennox 11X42 Heat Exchanger Assembly is a genuine OEM replacement component designed for use in select Lennox gas furnaces. The heat exchanger is a critical part of the heating system, responsible for safely transferring heat from the combustion process into the airflow distributed throughout the home or building. Replacing a worn or damaged heat exchanger helps restore proper furnace performance, maintain safe operation, and ensure efficient heat delivery.

Manufactured to Lennox factory specifications, the 11X42 heat exchanger assembly is engineered for precise fitment, durability, and long-term reliability. This OEM assembly is ideal for professional HVAC service repairs where maintaining original equipment performance and safety standards is required. Compatibility should always be verified using the furnace model and serial number prior to installation.

 

Key Features:

• Genuine Lennox OEM heat exchanger assembly
• Designed for safe and efficient heat transfer
• Restores original furnace heating performance
• Engineered for durability and long service life
• Direct replacement for Lennox part number 11X42

 

Applications:

• Residential and light commercial Lennox gas furnaces
• Furnace repair or heat exchanger replacement
• HVAC service and maintenance applications

 

Specifications:

• Manufacturer: Lennox
• Part Number: 11X42
• Product Type: Heat Exchanger Assembly