On this day in 1902, mechanical engineer Willis Carrier completed his design for what would become the first modern air conditioner.See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.

On this day in 1902, mechanical engineer Willis Carrier completed his design for what would become the first modern air conditioner. See omnystudio.com/listener for privacy information.

On this day in 1902, mechanical engineer Willis Carrier completed his design for what would become the first modern air conditioner.See <a href="https://omnystudio.com/listener" rel="noopener noreferrer">omnystudio.com/listener</a> for privacy information.

Willis Carrier designs the first modern air conditioner - July 17th, 1902

From the desk of “Stuff You Missed in History Class,” “This Day in History Class” quickly recounts a tidbit from today’s events in history.

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Willis Carrier designs the first modern air conditioner - July 17th, 1902

Willis Carrier designs the first modern air conditioner - July 17th, 1902