As the world reaches a global average temperature maximum, due to the onset of global warming, air conditioners have become a necessity in most homes. This is especially in tropical and humid countries such as India, Thailand and even parts of Europe and North America. You can understand the importance of air conditioners, but to truly grasp their novelty, it is of the utmost importance to know about their history. You should have an idea about the invention of the air conditioner. So, here you have a very brief history of the air conditioner.