Franklin was like that kid in class who always knew the answer to the teacher’s questions, but wasn’t motivated enough to raise his hand and share. Why do we say that? Franklin and his friend John Hadley DID perform the first documented testing for air conditioning in 1758 – where they successfully lowered a thermometer from 64 degrees Fahrenheit down to 7 degrees.
They concluded that the evaporation of chemicals was able to cool down an object, and even cause frostbite. He probably could have invented the first air conditioning system if he wanted to, but he was too busy being a Founding Father. Willis Carrier didn’t create our modern AC until 1902.