Replacement for an old 5 liter boiler

As Erstatz for an old, power-hungry floor-mounted boilers with 5l volume in the kitchen.
There is a hot water in the kitchen me the increased inlet temperature was very important, unfortunately that make only a few devices.
Why a water heater when it is already warm water?
Until the water temperature has really a viable flow almost 5 liters of water through the pipes and until then does the water heater hot water. And often you need such as washing dishes more than 5 liters of hot water. Yes, we have no dishwasher ....
The electronic control and with a possible inlet temperature of about 50 degrees the perfect device for one or two taps
Highly recommended !!