  An unusually large magnetocaloric effect for the temperature region below 10
K is found for the Fe14 molecular nanomagnet. This is to large extent caused by
its extremely large spin S ground-state combined with an excess of entropy
arising from the presence of low-lying excited S states. We also show that the
highly symmetric Fe14 cluster core, resulting in small cluster magnetic
anisotropy, enables the occurrence of long-range antiferromagnetic order below
T_N=1.87 K.
