Elias knelt by the massive York YK chiller. It was a beast of steel, pulsing with the flow of R-1233zd—a modern, low-GWP refrigerant. He touched the casing. It was burning.
He stayed on the roof for a moment, looking at the skyline. Millions of people were breathing conditioned air, sleeping in 72-degree comfort while the sun tried to bake the earth into clay. He was the invisible guardian of the dew point, the man who kept the moisture from the lungs and the heat from the wires. Refrigeration and Air Conditioning Technology
"It’s not the refrigerant," Elias muttered, his fingers tracing the frost forming on the suction line. "It’s the heat exchange. The cooling towers on the roof are choking." Elias knelt by the massive York YK chiller