<P> Modern air conditioning emerged from advances in chemistry during the 19th century , and the first large - scale electrical air conditioning was invented and used in 1902 by American inventor Willis Carrier . The introduction of residential air conditioning in the 1920s helped enable the great migration to the Sun Belt in the United States . </P>
<P> Modern air conditioning emerged from advances in chemistry during the 19th century , and the first large - scale electrical air conditioning was invented and used in 1902 by American inventor Willis Carrier . The introduction of residential air conditioning in the 1920s helped enable the great migration to the Sun Belt in the United States . </P>
who is widely regarded as the inventer of air conditioner
who is widely regarded as the inventer of air conditioner
Willis Carrier
Willis Carrier