Suburban 5381A ST-42 Tankless Water Heater for Intake Water 70 Degrees or HigherThe Suburban ST 42 and ST 60 Tankless Water Heaters provide an endless supply of hot water at a controlled temperature as set by the RV owner. The tankless feature saves energy by only engaging the burners when water is neededbe 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. Key