I had over 7 years, a predecessor of the LW45, it is each running half the year 24/7. Once a month, a rough cleaning with water changes and at the end of the complete cleaning ... and I to grab the stack of plates in the dishwasher and let this run with the machine cleaner and the rest of the Venta decompose in the items and thoroughly clean by hand. The mechanism for rotating the disk stack can withstand a little WD40 or a few drops of oil. Well ... recently the Venta has become my defective overnight ... the Electrical no longer wanted. It was needed replacement. Now the LW45 is none 2 days later with me. It is quieter than the old man, I can walk without leaving the stage 2, it bothers me. The shutdown when you're apart the shell no longer solved mechanically via a switch rather than an electrical contact, and he no longer runs of its own accord on when setting up the cover. It is powered by an AC adapter with power and the cable is delicate compared to its predecessor. A rough measurement has in me the result of Venta humidity from 36% to 47% raised during a pass of the air at 22C. The situation with me: district heating and forced ventilation ... without the Venta my humidity below 20% in winter.
The cleaning of the room air is also clearly noticeable ... and who does not believe it can explain to me how the result is a cm sludge as sediment in Venta after a month and why the water is slightly turbid after one day.
I had before that other humidifiers ... Ultrasonic nebulizers and hot evaporator. Weisser wet precipitation and excessive humidification were the consequences. And when the air cleaning these devices do not help. Thus, I see a cold evaporator with a laminate stack as in Venta as an ideal. Here, the LW45 for the largest rooms is suitable and has the largest water tank among comparable devices. I can only recommend the Venta solution and to advise the LW45 equal, ie the largest Venta buying.
