The invention of modern air conditioning became possible only in the late 19th-20th century, but scientists trace its history as far back as ancient Egypt. This is how one of the very first “air conditioners” looked like: wet reeds hung in windows. As the water was evaporating, the air coming through the window was cooled.
In 1902 Willis Carrier invented a large air conditioner running on electricity, thus launching the modern idea of air conditioning.
The range of air conditioners available on the market today includes window ACs (small, medium, and large), portable ACs, and split ductless ACs. Most top selling models are produced by Frigidaire, LG, GE, Haier, Kenmore, RCA, Quirky, and Whynter.