Although most homes have a hot water system, not all have the right system. There are different factors you should consider when installing or planning to replace your hot water system. With the right information, you can be able to choose the right type, size and brand of hot water system to install in your home. In a normal household, heating water accounts for a 1/3 of the total energy use in a home. Therefore, when you do a thorough research and check out alternatives, you can find a hot water system which is energy efficient thus saving money and its environmentally friendly.