Nowadays, air conditioners are one of the most common things in our lives, almost everyone has one at their home or office, but it wasn’t always like this, in fact the technology that made the air conditioning industry cheap and accessible to us all was developed quite recently in human history, the process of its creation was quite complex and had a lot of interesting moments, here are some interesting facts about it:

The first known research on cooling industry was made in 1758, when Benjamin Franklin (yes, the man behind electricity) and Cambridge University professor John Hadley discovered that evaporation of alcohol and other substances could cool down an object until freezing point, of course, this discovery was very far away from air conditioning units as we know them today, but it was the first breakthrough for the industry.