As the direct replacement for AP13145

protecting the heat exchanger and ensuring efficient combustion airflow

This critical combustion component is designed to facilitate high-efficiency thermal transfer while maintaining structural integrity under intense heat cycles

and the unit must be replaced

Lennox 17F15 Gasket 340155-7026 As the direct replacement forThe Lennox 17F15 Gasket Replacement Kit is an essential OEM component designed for high performance sealing in various Lennox furnace and HVAC applications. This kit features a 10x20 sheet of durable, white fiberglass material, engineered to withstand the thermal stresses and high heat environments common in modern heat exchanger assemblies. Whether you are performing a routine inspection or replacing a degraded furnace gasket, using genuine Lennox