The Lochinvar & A.O. Smith 100093634 K Blower Polaris 130K MVL 3633 is a high-performance combustion blower designed for Polaris water heaters and related HVAC heating systems. It delivers the proper airflow required for efficient fuel combustion, helping maintain stable burner operation and consistent heat output. https://www.partshnc.com/100093634-lochinvar-ao-smith-k-blower-polaris-130k-mvl-3633