Lochinvar & A.O. Smith 100233544 Bottom 318973-401 This high-grade industrial HVAC blower

This high-grade industrial HVAC blower shaft is a precision-engineered OEM replacement part measuring 1 inch in diameter by 19 inches (some configurations may vary to 21-1/2 inches depending on the specific 1360 blower assembly)

Designed as a professional-grade pilot igniter kit

Broad Compatibility: Ideal for 120Vac primary voltage applications requiring a stable 24Vac secondary voltage for control logic

including the specific 5/8-inch bore requirement

we recommend annual replacement

Lochinvar & A.O. Smith 100233544 Bottom 318973-401 This high-grade industrial HVAC blowerThe Lochinvar & A. O. Smith 100233544 Bottom Insulation is a critical OEM replacement component designed specifically for high efficiency commercial and residential water heaters and boilers. This high density combustion chamber insulation provides essential thermal protection for the unit base, ensuring optimal heat retention and preventing thermal damage to external surfaces. Engineered for compatibility with select A. O. Smith series and Lochinvar