• It is important to choose the volume of an electrical volume water heater or boiler depending on the needs of each family. Water heaters of larger volume consume more electricity. Meanwhile, if family members use water at different times of the day, a smaller boiler can also be used.
• When thinking about buying a water heater, you should examine the information provided in the energy label. Not only does it give you the energy efficiency class, estimated electricity consumption and noise level but it also helps you compare different appliances.

Recommended water heater capacity depending on the number of people in the household:

• 1 person → 30–70 litres
• 2 people → 80–150 litres
• 4 people → 100–250 litres
• 5 or more people → up to 300 litres

Depending on the space available in the room, both vertical and horizontal water heaters are available; however – vertical water heaters are easier to maintain.

It is preferable to place the volume water heater as close to the point of use as possible to prevent the heated water from cooling in the pipes.