Not much different at all if the soup pot is really, really mondo and you are boiling the hell out of it. I don't think your average dehumidifier would be able to keep up with a five gallon full volume roiling boil. Maybe if you had a mondo dehumidifier it would, but those are rather uncommon. You could always run a test by boiling plain water to see what happens. I'm thinking it will get kind of sticky in the room and rather quickly too.