A.O. Smith has led the way in innovative hot water solutions for nearly 80 years. With unmatched quality and diversity, A.O. Smith can provide hot water anywhere it's needed. The A.O. Smith ProLine® Mobile Home water heater is gas control convertible for natural gas or liquid propane, providing flexibility to meet varying needs. With a patented Green Choice® gas burner, the ProLine® Mobile Home water heater has an eco-friendly design that reduces NOx emissions by up to 33%. Featuring a CoreGard™ anode rod with a stainless steel core, the A.O. Smith ProLine® Mobile Home water heater has an extended life due to superior tank protection. With a side-mounted cold water inlet, the A.O. Smith ProLine® Mobile Home water heater provides ease of installation when cold water originates from below the structure. Mobile Home Water Heater Designed to meet the needs of manufactured housing installations, the A.O. Smith ProLine® Mobile Home water heater has convertible gas controls from natural gas to liquid propane. Side-Mounted Inlet The side-mounted cold water inlet on the A.O. Smith ProLine® Mobile Home water heater allows for an easier installation. Green Choice® Burner The patented, eco-friendly burner helps to reduce NOx emissions by up to 33% and complies with Low NOx emission requirements. CoreGard® Extending the life of your tank, the CoreGard® anode rod has a stainless steel core that provides superior tank protection compared to standard rods. Glass Coating Featuring Blue Diamond® glass coating, the A.O. Smith ProLine® Mobile Home water heater has better corrosion resistance compared to standard glass lining. Brass Drain Valve The solid brass, ball type, tamper resistant drain valve on the A.O. Smith ProLine® Mobile Home water heater provides enhanced flow. Use with a standard female hose fitting for simple draining and maintenance. Warranty 6 Year Parts 6 Year Tank Product Note The FMHR-40 ships ready for use with natural gas. A complete liquid propane burner is supplied for conversion.