Eight GB300 NVL72 racks (136 kW, 72 GPUs each) give 1,088 kW of IT in a 40 ft shell, drawn cut away — the Shell control ghosts, hides or restores the roof and walls. Cold plates capture about 90% of the heat into a PG25 loop: rack manifolds, the rear headers, the in-row CDU, then out through the end wall to two dry coolers in series. Colour is the code throughout: graphite is the rack row, blue pipework is the cold supply, amber is the warm return (about 10 K hotter), teal is the CDU, slate at the row end is the power section, and the copper run overhead is the 480 V busbar. Every number comes from one model object, driven by the load slider.