We bought this because our bathroom was in the room (no door) and suddenly the room much moistened. It has served us well to clean up and performed well despite the size of the room (with 3m to 15m high ceiling we started every day for 6 hours). Flats altering Note: the machine is a bit noisy, the tank is not accessible for cleaning, you must purchase a programmer at hand if you want to run it every day during your absences as was our case.