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The solar-house approach is based on taking full advantage of the free energy potential provided by the sun for space heating and providing hot water.
Solar houses are low or ultra-low-energy buildings that cover the bulk or at least half of their annual heating energy requirement by means of a solar thermal system.
Here again, a basic prerequisite for this approach is a building envelope that insulates really well against heat loss.
The following components are foreseen for supplying heat:
Solar house compound with solar storage unit (source: Andol; http://commons.wikimedia.org/wiki/File:Solarhauskomplex_mit_Solartank.png#/media/File:Solarhauskomplex_mit_Solartank.png)
Diagram of a solar house (source: Initiative Sonnenhaus Österreich)
With the solar house, too, the site location (climate, shade from trees, neighbouring buildings etc.) as well as the orientation of the building must be taken into account.
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