Funny you mention cooling towers, of course not on the same scale I guess...but they’re replacing the Evapco cooling towers, Trane chillers here in my hangar, as well as two other C-17 hangars. As well as all the air compressors and manifolds. Many yrs ago I worked as a boiler mechanic in the boiler room at The Medical Center in Macon, Ga, here in mid-Ga. They've got PVI and Murray fire tube and water tube boilers...change from gas to diesel depending on the time of the year. And a bank of ten, 300-ton Trane chillers in the CEP (Central Energy Plant), and many other chillers in various mechanical rooms, throughout that 10-story place. Most all of it controlled by Johnson Controls and Honeywell controllers. I can relate to the boiler, chiller *s-wordt!