I've bought the kit and refill described here as a cheaper alternative to expensive, usually electrically operated dehumidifiers. Because I have to lack dry space to hang laundry in the apartment, which, of course, the condensation on the windows extremely increases this time of year. The Wenko set performs his natural service, the amount of water that is collected but unfortunately only a "drop in the bucket" .... For slightly damp, small rooms but a good, affordable help ....