Air Cleaner

I looked at the site Air-O-Swiss because I wanted to buy something that cleans and moistens the air. What does an air scrubber do? What is an air filter do? What is the difference?

An air scrubber is an air filter / purifier, but an air filter is not an air washer.
And clean air purifies the air of air contaminants. Announcement air dishwasher, moistens and ionizes the air.

If I was in the market for what I would look at the air washer. One, because there is no filter. Two, because it retains moisture. And three, I think it's better together .... Personal opinion