The Lennox 12K80, 104077-01 Coll Box Gasket is a high-quality OEM component engineered for 3- to 5-burner gas furnaces. This gasket creates a critical seal between the collector box and burner assembly, preventing gas leakage and promoting safe, efficient operation. Made from heat-resistant, fiber-reinforced gasket material, it is built to withstand prolonged exposure to combustion temperatures and byproducts.Specifications:

• Part Number: 12K80 / 104077-01
• Component Type: Collector Box Gasket
• Application: 3–5 burner Lennox gas furnaces
• Material: High-temperature fiber-reinforced gasket compound
• Temperature Rating: Up to 500°F (260°C) continuous exposure
• Dimensions: Precision-cut for OEM fit (specific measurements vary by furnace model)
• Function: Seals the interface between burner assembly and collector box
• Compatibility: Fits select Lennox models including G40, G50, and other units using 3–5 burner configurations

Ensure dependable furnace performance and safety with this genuine Lennox gasket.
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