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Pre-heated Solar Water Heater (SP-C)Pre-heated Solar Water Heater belong to pressurized solar water heater. It’s main feature is the using of copper coil. And what’s the function? As the heat exchanger. User do not use the water from the water tank directly. The cold water comes into the copper exchanger, being heated, then goes out from other side for use. And because the using of copper coil there is no risk for corrosion or scale deposit, suitable for inferiority water area.
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