There are several types of vehicles, running water or storage, water heating for household use heaters and gas heaters;
Machines indirect radiant heating home hot water from the coolant heating system.
In flow-through heaters water is heated as they move past the heat transfer elements in the case of electric heating, copper tube gas columns or mesh heat exchangers indirect heating. At the same time to get really hot water, and not just warm, need a fairly large heat capacity, or water should flow slowly.
Saving water heater (boiler) differs from the much larger flow volume of the stored hot water, it is in everyday life more convenient, because the hot water to the desired temperature is in advance. In the boiler is constantly hot water, as well as flow into it goes cold and is heated to the desired temperature. Typically, a boiler capacity of 200 liters is enough for a family of 4 persons.
Saving water heater is more convenient flow.
