This is the standard North American approach, we have large insulated tanks that hold water at generally 38-48 degrees Celsius. My home uses a 40 gallon "water

This is the standard North American approach, we have large insulated tanks that hold water at generally 38-48 degrees Celsius. My home uses a 40 gallon "water heater" using natural gas with an always burning pilot light. It's possible to "run out of hot water" as a result.