Key Benefits: Exact OEM Fit: Specifically engineered as the direct successor to the discontinued 450-030-925

designed for heavy-duty applications including furnaces

The power head is designed to operate in ambient environments up to 125°F

Reduced Callbacks: Using factory-authorized parts prevents fitment issues and ensures the system operates at its original design specifications

Lennox 25W78 Insert 318518-761 Key Benefits: Exact OEM Fit:The Lennox 25W78 NOx Insert is a critical combustion component engineered specifically for Lennox gas furnaces to reduce nitrogen oxide emissions. Designed for high efficiency heating systems, this OEM Lennox replacement part ensures that the burner assembly maintains optimal fuel to air ratios for a cleaner, more environmentally compliant burn. Constructed from heavy duty steel to withstand high temperature furnace environments, the 25W78 insert