6-inch diameter for universal compatibility with most Lennox vertical-mount fan guards

Bypass-Free Operation: Patented duct assessment design eliminates the need for bypass dampers in most residential applications

Reduced Service Calls: Prevents common "no flame" signals and ignition failures caused by worn or fouled electrodes

Key Benefits: OEM Compatibility: Precision-fit for Lochinvar Knight KB81 models and specified A

Williams P320907 Fan Freon 6-inch diameter for universal compatibilityThe Williams P320907 Fan is a precision engineered 6 inch diameter fan blade designed for critical airflow management in heating applications. This OEM replacement part features a specific 0. 218" bore (standard 7 32" shaft compatibility) to ensure a secure friction fit on the motor spindle, preventing slippage or vibration induced wear. Primarily utilized within Williams Monterey Top Vent Furnaces equipped with the Blower 2901 assembly, this