The Suburban On Demand Water Heater provides an endless supply of hot water at a controlled temperature as set by the RV owner. The On-Demand feature saves energy by only engaging the burners when water is needed…be it for a hot shower, clean dishes or for hosing off after a day at the beach. The unit comes ready for set-up with an included wall mount digital control center. Designed with a wide array of safety & protection features.For climates or areas where the incoming water supply is below 70°F, or for winter RV use, the ST60 is recommended as the additional heating potential will adequately bring cold intake water up to desired temperatures. Flame Out ProtectionScald ProtectionAutomatic Fan MonitoringActive Freeze ProtectionPressure Release Safety ValveVoltage ProtectionTwo-year limited warranty