Suppose you want to take a bath. Average guest bath has a volume of 150 liters. If your Tankless water heater is set to heat to 65 ° C, it will be diluted with about twice and, consequently, the bath of 160 liters need 80 liters of water, then another 20-40 hp at the shower, it is necessary volume of 100 – 120 liters.
Now, about power. Suppose you have a family of 4 persons, and they all want to bathe or shower, or bath at least once a day. As a shower we spend up to 40 liters, we see us twice a day should be about 150 liters of hot water. When the power of 1 kW of 150 liters of water will warm up 12 hours. If your device can be operated at 2 kW, it will prepare the water for 6 hours. Now imagine that you need more water, and a new device you do not want to buy. If you have a STIEBEL ELTRON Series SH .. S or SH A Uni, then you can save your money is not the sacrifice of comfort, simply increasing the power!
