The Lennox 57W85 is a genuine OEM replacement heat exchanger engineered to restore your Lennox furnace to factory-specified performance. Designed as a direct-fit replacement, this heat exchanger ensures proper combustion gas containment and efficient thermal transfer between the burner and the air distribution system — two functions critical to both heating efficiency and indoor air safety.
Why Replace Your Heat Exchanger?
A cracked or degraded heat exchanger can allow combustion byproducts — including carbon monoxide — to enter the conditioned airspace. Replacing a failing heat exchanger with a genuine Lennox OEM part restores the integrity of the heat transfer assembly and helps maintain safe, efficient furnace operation.
Key Features
- Genuine Lennox OEM replacement part (SKU: 57W85)
- Direct-fit design for compatible Lennox furnace models
- Engineered for proper combustion gas containment
- Supports efficient heat transfer from burner to supply air
- Manufactured to Lennox quality and durability standards
- Helps restore furnace to original factory performance specifications
Application
This heat exchanger is intended for use in compatible Lennox furnace systems. Always verify compatibility with your specific furnace model number before installation. Consult the Lennox product documentation or contact a qualified HVAC technician to confirm fitment.
Installation Notes
- Installation should be performed by a licensed HVAC professional
- Inspect surrounding components — including seals, gaskets, and flue connections — during replacement
- Follow all applicable local codes and Lennox installation guidelines
