Since September 2006 new constructions who use hot water (houses, flats, hospitals, hotels, etc…) are required to conform to the new Código Técnico de la Edificación (CTE), installation of a solar thermal system, the system will be used to heat water and produce electricity.

Requirement isn’t the same depending on the regions and the climate of the area. As a whole, the European Union hopes by 2010 that 12 % of his consumed energy will be renewable energies.
The cost of solar thermal system is high but it last in average 25 years, except 10 years for amortization.