I live in SW Pa. and I too have sump pumps that have a tendency to run often. My old dehumidifier, cant recall the name, bit the dust after 4 years and we purchased a Hisense from Lowes last November. I tried doing various settings but hav found that on auto cycle, the humidity is between 48% and 50%. My basement is about 570 sq. ft. and I am happy with it so far. Actually, since I have been running a dehumidifier I have not noticed anything being rusty, electrical stuff works good too.