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What Type of Solar Water Heater System is Right For Your House? If you are interested in reducing your household’s energy costs, and your home is suitable for a solar hot water system, you should be aware that the cost can be significantly reduced by State and Federal incentives and rebates. A typical system will cost between $5,000 to $9,000. However, it may be possible for your investment in a solar water heater to pay for itself in less than two years depending on your location and household size. Most systems require little maintenance. An annual inspection is recommended to ensure that the system is functioning correctly. It is also important to check the cylinder and system components for leaks. A maintenance schedule should be developed with the help of your installer. Your installer will assess your household’s hot water requirements to design a system that is sized appropriately for your climate and house style. A basic rule of thumb is that a roof-mounted system requires one square metre of flat panels or tubular collectors per person to give sufficient summer hot water supply. A cylinder is required that is almost double the size of a conventional cylinder as it needs to be able to store enough solar-heated water to cover your hot water requirements during cloudy periods. A closed loop system is recommended for colder climates and will circulate a non-toxic, freeze proof fluid (usually polypropylene glycol) to the storage tank via the collectors and heat exchanger. The pumped fluid will be warmed in the solar collectors and then transferred to the storage tank where it is mixed with potable water. The system will use a pump to move the water around, and a controller to monitor temperatures and operate the system. An open loop system is more practical in warmer, frost free climates and will directly transfer the potable water from the existing hot water heater into the cylinder. solar water heater malaysia A boosted system will have an electric element to provide backup heating if there is insufficient sun for the solar water heater. Both types of system are eligible for the Renewable Energy Ready Homes Program (REHRP) incentive.
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