Popular Mechanics' brief history of air conditioning, window A/C units become affordable to normal humans in The Fifties. And over at Great Achievements.org, this happened as early as 1947. What's the deal with "World's first" claim? Maybe the Philco (still no relation) Bantam was the first one you could lug home and install yourself? See that happy gent, humping his new Bantam up the walk? You know he's hot and sweaty because they loosened his tie for the shoot.
Here are some impressive numbers from the PopMech link. The first home unit of any kind appeared in 1914 in Minneapolis in the mansion of Charles Gates. It was the size of a car. In 1931, the first commercial window unit became available, and cost from $120,000 to $600,00, accounting for inflation. Jeebus!
Doesn't that make you glad you can just stick your head out a window to cool off on a day like this? Didn't think so.
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