For a household using 200L of hot water per day, a natural gas system can save around $200 a year.
Gas systems are also far better for the environment than wasteful electric systems. Gas systems produce as little as a third of the greenhouse gas emissions of electric systems.
Source: Alinta Gas
Storage systems heat the water slowly and store it in an insulated tank at the right temperature for use throughout the day.
Continuous flow (also called instantaneous) systems heat the water as it is required, removing the need for a storage tank. These heaters are connected to the mains water supply and deliver heated water at a slightly reduced pressure than cold water.
We recommend getting 3 quotes from different suppliers so that you can compare brands, systems and prices.