Lennox 96L74 – Heat Exchanger Assembly

 

This Lennox 96L74 Heat Exchanger Assembly is a high-quality OEM furnace replacement component engineered for efficient heat transfer, long-term durability, and dependable performance in residential and light-commercial HVAC systems. Built from corrosion-resistant materials and designed to meet strict Lennox manufacturing specifications, this heat exchanger restores proper furnace operation by ensuring clean, safe, and consistent heat distribution. It is an exact-fit replacement for compatible Lennox units, helping contractors and homeowners resolve issues related to heat loss, cracked exchangers, carbon monoxide risk, or declining system efficiency.

The Lennox 96L74 Heat Exchanger Assembly supports stable combustion performance, improves heat output, and helps extend overall furnace lifespan when installed in place of a worn or damaged exchanger. Its precision-formed interior surfaces maximize thermal conductivity while maintaining controlled airflow paths, allowing furnaces to meet their rated BTU performance. Ideal for preventive maintenance, system restoration, and repair work, this OEM part helps maintain factory efficiency levels, reduce energy waste, and ensure safe operation throughout the heating season.

 

Key features

• Original Lennox OEM heat exchanger assembly designed for reliable furnace performance
• Engineered with corrosion-resistant materials for improved durability and heat transfer
• Maintains proper combustion, airflow, and thermal efficiency
• Supports safe furnace operation by reducing risk of CO leaks caused by cracked exchangers
• Exact-fit design for fast installation and system compatibility
• Ideal for restoring lost heating capacity and optimizing furnace output

 

Typical applications

• Residential gas furnaces
• Light-commercial heating equipment
• Preventive maintenance, seasonal tune-ups, and furnace rebuilds