Air conditioning technology for commercial use was invented in the early 20th century. The first modern air conditioning system was developed by Willis Carrier, an American engineer, in 1902. He designed it to control the temperature and humidity inside a printing plant in Brooklyn, New York. Carrier's invention marked the birth of modern air conditioning, and he is often referred to as the "father of air conditioning."
Initially, air conditioning was primarily used for industrial and commercial purposes to improve the quality of industrial processes and maintain consistent conditions for manufacturing and storage. It was later adapted for use in public spaces, such as movie theaters, department stores, and offices, to provide comfort for customers and employees.
Residential air conditioning became more widespread in the United States after World War II, as the technology became more affordable and accessible to the general public. Today, air conditioning is an integral part of modern life in both commercial and residential settings, providing comfort and improved living conditions in various climates around the world.