(republished on 07/24/06)
(published on 08/21/06)
(published on 06/18/09)
(published on 04/21/11)
(published on 01/18/12)
I use that sort of humidifier. Adding salt does work. The heating comes from the electrical current flowing through the water. Tap water has a pretty low conductivity, so not much current flows. Adding salt raises the conductivity, since the ions are electrically charged. You actually have to be a bit careful not to add too much salt, since you don't want to blow a fuse.
The effects on the boiling point are very minor compared to the effects on the conductivity.
BTW, although these humidifiers are cheap they do have the nice advantage that since they output water vapor, not dorps, you don's have to worry about bacteria ect. getting spraued into the air.
(published on 02/25/14)