How was the first AC?
How was the first AC? Willis Carrier, a 25-year-old experimental engineer, created a primitive cooling system to reduce humidity around the printer. He used an industrial fan to blow air over steam coils filled with cold water; the excess humidity would then condense on the coils and produce cooled air.
How did humans survive without AC?
Architecture played a big role in keeping homes cool. By creating archways, large windows, and high ceilings, builders could funnel in outdoor breezes and create cross-ventilation. Porches built in the shade also gave people an area to cool off during the evening.