Hey, i used the dehumidifiers for a long time, but actually today this is not recommend not only because of the energy waste but also because it is not good in big cities to live in bad environments such as this ones. The dehumidifiers are only recommended if you have any specific healthy problem, thant is good if you find any better option... Here i've read somethings about Humidifiers... and i recommend one better than the other option... obviously, as i said, you don't need to use it if you have healthy reasons, than is better to look for the best dehumidifiers.. but when the air is to dry it isn't good because of the polution and also the respiration problems, thats why in some places the humidifiers are beeing bought. http://www.nytimes.com/2012/03/01/garden/humidifiers-shopping-with-leon-ransmeier.html?_r=1&ref=garden