The invention provides a system for providing heated domestic water. The system comprises a heating structure such as a solar collector and a tank connected by an upstream fluid path and a downstream fluid path. A control system is adapted to interrupt supply of water from a source to the system when the domestic water is delivered to a recipient. The invention further provides a heating system with a tank which is filled to a certain limit leaving a certain amount of free space, e.g. to adjust absorption of energy to a supplied amount of energy or for reserving space for drainage of the solar collector. The invention further relates to a solar collector which is protected against excessive temperatures. Furthermore, the intention provides a method for providing heated domestic water.
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