This is a floor tower unit with a large tank that's easy to fill. Does the job in my large Livingroom, kitchen and hallway area if you leave it running all day (checked by a humidity monitor.) here are the issues I had with it:
1. It is NOT portable. I originally intended to move it from the Living area to my bedroom at night but be aware - It will leak all over your floors or carpet If you try to move it. Because of that I had to buy another smaller unit for my bedroom.
2. The cool mist makes the room colder, so be aware of this especially in the winter as it can make an area a little chilly.
All and all, I kept it as it was rated well and has that germ killing feature but it needs to stay put wherever you use it.