We have a programable thermostat. Our air is set for 87 during the day and 84 from 11:00 PM until 7:00 AM. Doing that makes sure the unit runs everyday and dries and circulates the air. Our bills run around $25-$35 a month. We also put a canister of damp rid in each bath. This seems to work very well. We have friends that use a humid-stat and they are happy with that and their bills run about the same so I guess it's whatever floats your boat.
