The history of Air conditioning
This is true that the machine format of cooling started very late in the world but the concept of making rooms cool is very old. Ancient Romans were believed to circulate aqueduct water through the walls of the rooms to make them cool. Thus this concept finds its roots rock bottom in human civilization. Dinh Huan was the scientist who invented the rotary fan for air conditioning. Persian also joined this race and they were believed to use cisterns and wind towers to cool different rooms in their houses. Ventilators were believed to be invented in Eqpyt and thus every country of the world shook their hands to make air conditioning an important part of our lives.