Product review (5 stars): First one lasted 10 years.
Best humidifier EVER.  This is the second one I have owned.  The first one lasted about 10 years running 24/7... That's 3,650 days of continuous use.  I only replaced it because bacteria had started to grow inside the water jugs toward the end.  (The fan motor was still running perfectly, and as quiet as ever).  I now use an anti bacterial solution on occasion and have no doubts  this second one will last even longer.

Plus...  I also have a Vornado air purifier that has run nearly non stop for 15 years.  Vornado is the best brand in the Universe, and I will buy nothing else.