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Draft PPS18: Renewable Energy
Annex 1 Solar Thermal (Solar Water Heating): Technology

G4. The key component in a solar water heating system is the collector. Two main types are common in the UK: flat plate collectors and evacuated tube collectors. In both types, radiation from the sun is collected by an absorber, and is transferred as heat to a fluid, which may be either water, or a special fluid employed to convey the energy to the domestic system using a heat exchanger.
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