OGB SLIM series water heaters combine a recognizable rectangular design with rounded corners and the familiar technological functionality of OGB models. All this in the compact design of the OGB SLIM models. the new generation of heaters are equipped with a modern electronic control unit with LED indicators or a display for temperature control. The optional EcoSmart function achieves heating efficiency in accordance with the environmental directive. EcoSmart Self-Learn Function After 7 days of operation, the system calculates the optimal mode of operation that will satisfy the user's needs with minimal energy consumption. This actually means that in 7 days the heater remembers at what time of day the user spends the most hot water. After seven days of tracking, the water heater uses the collected data to turn on and heat the water ahead of time before the user needs it. This saves energy, because the water heater will not maintain a constant temperature, for example 55 ° C, as it would with a normal setting. If changes need to be made, the tracking cycle must be repeated. Thus, using the EcoSmart function saves up to 25% energy per year!