Lennox 25B33 – 625347-02 Burner Box UH Assembly, 80% Closed

 

This genuine Lennox OEM 25B33 burner box assembly is engineered for precise performance and safe operation in compatible 80% AFUE furnaces. The 625347-02 burner box maintains correct combustion airflow, securely houses the burner components, and helps ensure consistent ignition reliability. Designed to meet Lennox factory specifications, this assembly offers a direct, plug-and-play replacement for worn or damaged burner housings.

The 80% closed burner box design enhances combustion stability and reduces heat loss within the furnace cabinet, supporting dependable heating performance throughout the season. Ideal for both residential and light commercial systems, this replacement part helps restore system efficiency and prevent burner misalignment issues that can lead to ignition problems.

 

Features

• Genuine Lennox OEM burner box UH assembly
• Part numbers: 25B33 and 625347-02
• 80% closed design for improved combustion control
• Restores proper burner alignment and housing integrity
• Ensures consistent ignition and heating performance
• Built to Lennox factory specifications for exact fit
• Suitable for 80% AFUE gas furnace models using this assembly

Common Applications
This burner box assembly is commonly used in Lennox 80% furnaces that require the 25B33 / 625347-02 housing. Always verify compatibility with the furnace model and serial number before ordering.

 

Technical Notes

• OEM replacement part
• Type: Burner Box UH Assembly
• Furnace Efficiency Category: 80%
• Lennox Catalog/Manufacturer Part: 25B33, 625347-02