In 1906, Stuart W. Cramer of Charlotte was Discovering methods to insert humidity into the air in his textile mill. Cramer coined the time period "air conditioning", making use of it in the patent assert he submitted that year as an analogue to "drinking water conditioning", then a well-recognized approach https://docs.google.com/spreadsheets/d/1sFkX-195bzbspltn6kI7pJAwHC_IWJIWy0giWMghe84