old post. Thanks for the input. I am working out a closed system grow using my HVAC system in my attic. This way I can obtain a steady temp. but as with any HVAC system it has a tendency to suck the moisture out of the area. So I was contiplating this to add humidity without increase in heat. (I thought the Dry mist was a wierd comment too). but after talking to a few people, made it sound like a mold factory. Thanks though.