Show needed more Moi moisture As far back as 1780 benjamin franklin realizing the need of more moisture in heated homes in included a crude evaporator pan in his fa franklin stove A century later joseph mccreary of toledo ohio patented an air washer and cooler and in 1906 two engineers working independently developed mechanisms for the automatic control of humidity in the air at the turn of the century the goal of researchers was the development of machinery for giving the proper de gree of moisture in cotton te textile tile plants and other factories where humidity affected production but shortly thereafter it was dl discovered s covered that space could be chilled for hu man comfort |