The evolution of an industry and its impact on society often make an interesting study. Take portable air conditioning: Introduced to America in 1983 by Denso, a Japanese manufacturer of automotive products, portable air conditioning was first designed to cool workers on the assembly line.
Any competent a/c or mechanical contractor can provide a cooling system for a typical building. They size the equipment for the load and install a duct system for adequate air distribution. But whom do you call when your structure has specific requirements and does not resemble anything you have ever cooled before?