Nowadays the integration of thermal energy storage (TES) into HVAC systems seems to play a key role in determining a decrease in heating and cooling energy needs in the buildings sector, which will keep growing. Indeed, TES systems allow to decouple generation and demand for heat, power and cooling and to store renewable solar energy, dealing with its intermittency, improving energy efficiency systems and thus leading to a reduction in fossil fuel energy consumption and GHG emissions. The current state of the art of energy storage technologies requires the design of novel adsorbents to achieve relevant improvements in this field. Metal-Organic Frameworks (MOFs) are a new class of porous crystalline materials that are organized by the coordination between inorganic metal units and organic ligands.