I have had a Venta LW15 for a long time, and like it. I have gone through many humidifiers, and the LW15 is the only one that has lasted more than five years and does not require filters. It is expensive, even with cleaning>
It does require regular cleaning, though -- that can be a pain. It pulled minimal power, too.
I have switched to a whole house humidifier this year and I really like not having to change water every day. I am not sure how it will work in the long term.
I don't know if the LW15 has a different mechanism than the LW45, but it shouldn't be difficult to clean. The entire machine literally comes apart (https://youtu.be/-f2FAI70BSk?t=154), leaving only plastic pieces that can be hosed down.
It is probably the same mechanism. The only thing that took time was wiping down both sides of than fan blades.
I would still be using the venta if I didn't have a new geothermal system installed. The ultrasonic humidifiers I had before the venta didn't last more than two years.
It does require regular cleaning, though -- that can be a pain. It pulled minimal power, too.
I have switched to a whole house humidifier this year and I really like not having to change water every day. I am not sure how it will work in the long term.