The Lochinvar & A.O. Smith 100271839 Blower Assembly is a reliable replacement component designed to provide consistent airflow in compatible gas-fired heating equipment. It works by using a motor-driven blower wheel to move combustion or ventilation air through the system, supporting proper burner operation and efficient heat transfer. Commonly used in Lochinvar and A.O. Smith boiler... https://www.partshnc.com/100271839-lochinvar-ao-smith-blower-assy-wo-pressure-port