Over a quarter of the energy used by Australian households goes to hot water, making it one of the biggest household expenses and a major contributor to greenhouse gas emissions. It’s important to know about the different options available before making a decision about what type of hot water system to buy and where it will be located in your home. There are many considerations, from the size and type of your household to your location and climate, that affect your choice of hot water system.
Domestic hot water (DHW) systems include the cylindrical floor standing tanks found in residential homes that provide hot water for showers, sinks, dishwashers and washing machines. They are sized to meet the requirements of your household and are typically powered by electricity. However, there are also gas based systems and even solar hot water systems.
There are two main types of electric hot water systems; storage and continuous flow. Storage systems heat and hold water in a tank until it is needed, however this limits the amount of hot water you can use at any given time. Continuous flow systems heat the water as it flows through, which means that you can have a larger supply of hot water at all times, however they may require a higher energy cost than a storage system.
If you are interested in a gas hot water system there are instantaneous and gas continuous flow systems available, as well as gas split system heaters which can serve multiple points. Gas units can be connected to a natural gas, LPG or town water supply and require a larger gas pipe than an electrical system. Instantaneous models require a larger gas burner and may require installation of a larger gas meter to accommodate the increased flow rate.
DHW systems can be a great choice for households looking to reduce their energy consumption. This is because they only heat water when it is required and avoid the energy and electricity costs of keeping a large volume of hot water ready for use. However, you should be aware that there are significant energy and carbon emissions associated with the production of natural gas.
When selecting a new DHW system you should also consider safety features. These can help prevent accidents such as scalding and ensure that your hot water is safe to use. Some common safety features include temperature and pressure relief valves, overflow pipes and anti corrosion anode rods.
source https://flowlinkplumbing.wordpress.com/2023/09/09/hot-water-systems-what-type-of-hot-water-system-is-right-for-your-home/
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