I live in Utah....yeah, this won't work here. 30% is high humidity here. And, it gets worse the higher I go (you know, where we like to go backpacking). A friend of mine on Facebook showed me the link as an option for me (he knows I love backpacking). Maybe if I backpacked in Houston. I wonder if I put one in my house in the summer time, with my swamp cooler running....use electricity to add humidity to the air and then use electricity to take it out of the air. Very efficient.