I have a “Holmes” that I’ve used for 15+ years.

I got it at Walmart; they don’t sell the filters anymore, but Amazon does.

It has the separate charcoal filters, which is nice for pets.

I use it around my wood stove, it’s great.

If you’re looking for something in a bedroom, you’re main concern will be noise. They can be loud, especially when the filters need to be changed.