If you are going to switch from the system Centralized water heater for instant water heating system, it may be time to start thinking about where to place it in your home. The size and design of your home as well as geographic locations are key aspects that affect the placement. However, there are other factors that will determine the efficiency.
One of which is the geographical location, the easiest way to explain how geography affects the efficiency Centralized water heater you is that they all work better in warmer climates because of the water temperature. If you are in a cold weather climate north as Minnesota or New England, where the weather is cold in winter, thankless gas or electric water heater would take more energy to raise the cold water that comes into the hot water temperature is right.
In Southern climates, water started at a higher temperature and requires less energy to make it efficient. If your house is small, or if you have a small condo, then you can probably get away with just one Centralized water heater. But if your home is to lie with the bathroom located at opposite ends of the house and a washer and dryer and kitchen lies elsewhere, then you need to look into using smaller units for each remote areas.