Heat pump water heater for heating of sanitary water. Thanks to the A + label, the heat pump is extremely economical. The extra sound insulation ensures that the device is very quiet. The reservoir is made of stainless steel and has a volume of 200 or 270 liters. This allows domestic hot water to be provided for 5 or 6 people. The appliance has a patented eHD heat exchanger with microchannels, made of aluminum, which has the advantage that they are not in contact with the sanitary water.