The Lochinvar & A.O. Smith 100187883 Burner is a genuine OEM replacement component designed for commercial gas water heaters, including Cyclone Mxi BTH, SUF, and HCG 300, 400, and 500 series units. It works by distributing the gas-air mixture through the burner surface to create stable, efficient combustion for water heating. This burner supports consistent heat output, reliable opera... https://www.partshnc.com/100187883-lochinvar-ao-smith-burner