the device achieves a good dehumidification, even with use of max. allowable space size. However, this good performance is mitigated by the large heat generation, the unit makes it unusable in normal living rooms. In my experience, rooms with approx 20-30m2, the dehumidifier heats the room by about 3-5 ° C for the same period the rel. Humidity to decrease by 5-7%. Therefore, make sure only what cellar or the like, where such an increase of the room temperature does not play a major role. In the living and sleeping area, one can only opt thanks to this device between wet or hot. However, as a use in the summer is more likely prefer to wait for more favorable weather conditions and air.