GEESEN 15 Gallon RV Water Heater, Electric Hot Water Storage Tank, Compact Point-of-Use, Indoor Waterproof [Energy Class B] Compact design: This 20-gallon RV water heater is designed for compact spaces, making it ideal for recreational vehicles and trailers. Electric Heating: The heater utilizes electric heating to provide hot water on demand, eliminating the need for gas or propane. Endless Hot Water: With a point-of-use design, this water heater delivers a continuous supply of hot water for showers and other needs. Indoor installation: Constructed with a waterproof exterior, this unit is suitable for indoor installation in bathrooms or other enclosed spaces. Easy Controls: The water heater features simple controls, including a temperature dial and low/high settings, for convenient operation.