Choose by Household Size
1 person: 5L is enough for hand-washing and rinsing vegetables. 2 people: 6L covers daily dishwashing. 3 or more: go straight to 10L to avoid running out of hot water.
Check Your Circuit First
Most older kitchens have 10A sockets (~2200W limit). 10L models draw around 2000W, which is close to the ceiling — a 16A dedicated line is safer for high-power instant models.
Avoid These Pitfalls
Confirm outlet direction (top/bottom water inlet), enameled tank material, and separate warranties for the unit and the tank before ordering.