Annex 20 has been developed to aim the target of "Sustainable cooling with Thermal Energy Storage".

Renewable and natural energy sources , main components of sustainable energy systems, can only be made continuously through thermal energy storage (TES).

In addition to heating , TES provides several flexible alternatives for cooling systems. Recent discussion on topics like global warming and heat waves have brought attention once again to energy efficient cooling system utilizing renewable energy sources.

Cooling demand has already been increasing due to the evolving comfort expectations and technological development around the world. Climate change has brought challenges for cooling system designers. (...more on Annex 20 legal text)