We need hot water to wash out dishes, our clothes and ourselves.
Some houses have hot water delivered through a centralised supply system, while in other houses water is heated on the spot by electric or gas boilers. In both cases, energy is used to heat the water.
If hot water is delivered to the house by pipes, heat is lost to the ground, entailing additional expenses. It is therefore very important not to waste hot water.
Modern domestic boilers have good insulation and are fitted with timers that allow you to programme the temperature and heat water at the most convenient time of the day. Boilers that switch on automatically are also useful in terms of reducing the amount of energy required to heat water.