A precast monolithic concrete prefabricated, composite building construction module formed of a substantially planar rear wall. The rear wall has embedded therewithin a radiator pipe for circulating a fluid at a temperature that is different from an ambient temperature of the modular component within the rear wall. The module may comprise at least one side wall integral with the rear wall that terminates at one end at a corresponding end of the rear wall. The rear wall has a length and each of the at least one side walls has a length and extending in a first direction substantially normally away from the rear wall sufficient to substantially enclose and define walls of a standard facility, the at least one side wall supporting the rear wall to cause the module to be free-standing while devoid of lateral support. The radiator pipes are interconnected through inlet/outlet junctions by tubing with other inlet/outlet junctions to permit a single circulating fluid source to circulate fluid through the radiator pipes of a plurality of the modules making up a building structure.