Those who are not European or Japanese will probably find the concept of a tankless water heater quite funny. In fact, trying to figure out how one can heat water without actually storing it in one place is not easy if you have not seen one of these things. All tankless water heaters only heat the water that is used at any moment of time, the rest of it is stored in the tank of the house or apartment until it is required later on. Three reasons why Europeans love this system are:
They are highly efficient and heat only the water which is required at any particular point in time rather than heating an entire tank.
They make use of natural gas as the heating fuel by combusting it to keep pipes hot and ready. This does not require too much natural gas and expenses are lower.
European countries and Japan do not have any problems with the higher emissions of tankless heaters unlike those settled in the United States.
A way to find out more about these hot water systems is to read as many tankless water heater reviews as you are able to find. This will help to give you a better understanding about this topic.