Modern air conditioning was not actually invented to keep people cool, but to keep paper dry. In 1902, a young engineer named was working at a Brooklyn printing plant where the summer humidity was causing paper to expand and contract. This ruined the alignment of four-color printing jobs. Carrier designed a system that used chilled coils to pull moisture from the air, unintentionally creating the world’s first electrical air conditioner.

: In 1881, to save the dying President James Garfield, engineers blew air over a massive box filled with 6,000 pounds of ice. It lowered the room temperature but used 436 pounds of ice per hour.

: Thousands of years ago, Egyptians hung wet reeds in windows so the breeze would cool the air through evaporation. History of Air Conditioning - Department of Energy

Air Conditioning -

Modern air conditioning was not actually invented to keep people cool, but to keep paper dry. In 1902, a young engineer named was working at a Brooklyn printing plant where the summer humidity was causing paper to expand and contract. This ruined the alignment of four-color printing jobs. Carrier designed a system that used chilled coils to pull moisture from the air, unintentionally creating the world’s first electrical air conditioner.

: In 1881, to save the dying President James Garfield, engineers blew air over a massive box filled with 6,000 pounds of ice. It lowered the room temperature but used 436 pounds of ice per hour. AIR CONDITIONING

: Thousands of years ago, Egyptians hung wet reeds in windows so the breeze would cool the air through evaporation. History of Air Conditioning - Department of Energy Modern air conditioning was not actually invented to