This is the cheapest method to get hot water.  It is cheaper than using an urn, kettle or a stove. It is cheaper than a standard 100 liter geyser, because you only heat the 5 or 20 liter water that you need, not the 100 liter geyser.  It is far quicker than a kettle, which only heats up 1.7 liters at a time. To heat 5 liters takes approximately  9 minutes. The water is so hot you cannot touch it with your hand.  Even if you have a geyser, the hot water element is much cheaper than prepaid electricity cards.  A warm water heater makes water as hot as a kettle.  These warm water elements are portable.  No installation, just plug it in and switch it on.  These hot water elements operation are maintenance free.  This type of water heater is also called a "Hot Water Heater" or a "Tankless Water Heater".  Features  220 to 240 Volts, 50/60 Hz, 1500 Watts.  Weight is 0.3 kg.