The Lochinvar & A.O. Smith 100135304 Burner is a high-efficiency gas burner that is used in heating water. It uses a premix burner that mixes the gas with air before igniting thereby giving a cleaner or complete combustion and minimal heat loss. This burner is mainly applied in commercial and industrial services such as hotels, restaurants, and manufacturing companies. For an effic... https://www.partshnc.com/burner-15