the central facility both in side to side and or in back to back juxtapositions typically without the need for interleaving space between adjacent modules in order to maximize real estate use each data center module typically comprises harden party walls several floors for accommodating all the necessary electrical and cooling subsystems and for accommodating all the computing machinery though all the data center modules share similar physical configuration each data center module can be independently customized and operated to accommodate different needs each data center module also incorporates a highly efficient hybrid cooling system that can benefit from both air side and water side economizers application_number US 201414577276 A description novel prefabricated data center modules and a method of their large scale deployment will be described hereinafter although the invention is described in terms of specific illustrative embodiments it is to be understood that the embodiments described herein are by way of example only and that the scope of the invention is not intended to be limited thereby referring to fig la a module based data center complex is shown at 10 to be composed of a main facility building 100 surrounded by clusters 205 of prefabricated data center modules or units 200 in this case 2 clusters 205 of 32 modules 200 each the central facility 100 hosts the services that are shared by the modules 200 low or medium voltage power feeds chilled water feeds.