Have you owned the same water heater for a decade or longer? If so, you probably have the popular, standard, tank model. This type of water heater is comprised of a large cylindrical tank, which keeps a constant supply of water stored at a consistent temperature. This hot water is ready for use whenever you turn on a tap in your home. Water heaters of this kind are effective and can sometimes be the best option for your home. However they are certainly not the only option.