At the time of its invention, it was called "Apparatus for Treating Air". You know it as air conditioning and it was invented on this date in 1902 by American engineer William Carrier.
The first air-conditioned home was in Minneapolis in 1914. It was kind of dangerous back then because they used toxic ammonia as a coolant! YIKES!
Carrier continued to modify his invention and it really took off in the mid-twenties when he sold his invention to movie theatres and department stores in NYC. The United State House of Representatives installed it in 1928 with the Sentate, White House and Supreme Court soon to follow.
As we swelter with 19 90+ days and 4 100's so far (and 100 degrees today?), I salute William Carrier.
I LOVE YOU!!!!!!