Comment by nerdjon

I use the IKEA air purifier and love them, but I had a specific use case in mind.

My cat boxes are in an enclosed big box with a single entrance, I wanted to put the filter in front of the opening (kinda creating a walkway) to help eliminate smell and dust. It does these tasks wonderfully.

I don't think I could see myself using them for filtering an entire room, but they do a good job for what they are.