Lennox 25B31 – 625347-01 Burner Box UH Assembly, 80% Closed

 

Product Description

 

The Lennox 25B31 (625347-01) Burner Box UH Assembly is a high-quality OEM replacement component designed for 80% efficient gas furnaces. This burner box ensures proper combustion control, stable ignition, and reliable heating performance across compatible Lennox units. Manufactured to exact Lennox specifications, it maintains airtight operation to support efficient fuel usage and consistent burner flame quality.

Ideal for system rebuilds, warranty repairs, and preventative maintenance, this 80% closed burner box assembly helps restore optimal furnace operation while preserving safety, airflow management, and manufacturer-rated performance.

 

Key Features

 

• OEM Lennox 625347-01 burner box assembly
• Designed for 80% efficient gas furnace models
• Closed-style construction for controlled combustion
• Supports stable ignition and consistent flame performance
• Ensures proper furnace airflow and heat distribution
• Built for long-term reliability and exact fit replacement

 

Specifications

 

• Manufacturer: Lennox
• Part Number: 25B31
• Catalog Number: 625347-01
• Component Type: Burner Box UH Assembly
• Efficiency Rating: 80% furnaces
• Construction: Closed burner box assembly
• Application: OEM furnace burner compartment replacement