I'm surprised how much water this device within 24 hours at level 2 (on the night of 3 - but is to be Tags for us loudly) releases. Every day the container is cleaned by us and then refilled again with warm water and a drop of dish soap (not take a long time - about 3 minutes). Approximately 1x per month comes the "roll" alone at low temp in the dishwasher -. It sees slack off (the manufacturer's but I believe no guarantee - your own risk !!!). With 10 l capacity approx 2l remaining amount in the container remains (can not be therefore available but as soon as possible refill). 8l water accumulate in our living room + dining room + kitchen with a total of approximately 60 m² on - kaltverdampft - without water spots on the floor. The rel. Humidity is relatively constant at 45% although we have a controlled ventilation and persistent dry air coming from the outside into the room and the "wet" air again evacuated. Without the humidifier we had earlier in the winter about 25% and below - respiratory diseases were common! In summer the unit on hold, because with us enough humidity is then available. Whether the device is to blame, that in our family this year no respiratory diseases have occurred so I leave undecided. The bedroom has a one year old device from Beurer - smaller model - I would buy again Venta - no comparison. The Venta has incidentally also not "float" that can get dirty. The water level is measured via the conductivity - can not pollute and is therefore much more hygienic. The supplied chemicals we do not use. However, the cleaning effect I series rather than a fairy tale - the few Staubflankerl the get lost in the interior would anyway landed in my view at this point - Well. Overall, however, an absolutely recommendable product - we could not be without - no kidding !!! Real