Product review (5 stars): Versatile and easy to set up
I've got this monitoring a crawlspace that got completely taken over with mildew and mold over the summer. I just cut an extension cord in half, wired it up according to the instruction booklet (there are youtube videos out there that can help clarify things for you), plugged in my fan and it kicks on when the humidity gets too high. Perfect, inexpensive solution.