Ceiling fan article edit   Thanks for your recent contrib to the ceiling fan article Its good when people edit things because it sparks thought in new directions  I admire the originality of your thought and the level of observance required to note such a detail as a fans usefulness in humid versus dry climates  Howeverand I mean this in an amusing way rather than offensivelyyou were totally wrong The statement about a fans usefulness in dry versus humid climates was in fact not backwards  This is how the statement read before you edited it  Since a fan creates its cooling effect by speeding the evaporation of moisture on human skin its perceived usefulness is directly correlated with the amount of humidity moisture in the room In dry environments such as desert climates a fan has a lesser perceived usefulness than in humid environments this is especially notable during cold weather where a humid environment has a pronounced windchill effect which is lacking in dry environments  You said in your edit summary to refer to the heat index article So I did The introductory paragraph to that article reads  The human body normally cools itself by perspiration or sweating in which the water in the sweat evaporates and carries heat away from the body However when the relative humidity is high the evaporation rate of water is reduced This means heat is removed from the body at a lower rate causing it to retain more heat than it would in dry air  thus proving that my original statement in my ceiling fan article was correct In humid climates heat is naturally removed from the body at a lower rate than in dry climates causing a person to remain hotter longer than in dry climates Thus there is a greater need for a fan than in desert climatesthus it is perceived as being more useful  I saw via your userpage that youve grown up in New York Im originally from the east coast myself and I lived here my whole life save for two years in Utaha very distinct desert climate The lack of humidity out there is actually quite a pleasure In the summer there it can be  degrees and feel no hotter than  here on the east coastyou look at the thermometer there and say Wow I didnt realize its over this isnt that uncomfortable I wasnt dying for a fan there the way I do here Also the converse is truethe winters out there are more bearable than they are here They dont seem as cold because the humidity is really what adds the bonechilling factor into the mix  Anyhow Ive reverted your edit to the ceiling fan article But thanks for reading it and contributing In the future before making edits to statements of fact in an alreadyestablished article please get a consensus on the articles talk page  Thanks