The ones I saw, Vidyaa, were all steam humidifiers. That is why I did not buy them. You will get to know shortly what inquisitive young ones do to things you ask them not to touch

It is almost a year since I scouted around for one - I think it will be around 250. Not sure. You may want to try at Jammi Bldgs. I believe they have medical equipment store there, everytime I need something everyone in Adyar, TVyur area ask me to go there