Warm water incorporates 60% of the water used in the showers. As the heated water is not fully utilized in the showers, 20-30% of the energy is wasted in the drain. A Finnish cleantech company has developed an innovative solution to the households' shower, that saves 40% of households' energy consumption. Regardless of the heating method used, the energy saving solution can be installed to most apartment houses, row houses, town houses, hotels, spas, sports centres, etc. The use of the energy saving solution is easy and safe, and maintenance does not require special tools.