Judy, I find that there is not as much dust when she shakes now. And she seems to be less itchy with herself.
As far as the brand, it is a Bionaire brand. But upstairs in the room she sleeps in, I bought a warm air humidifier from the same place I bought my air cleaners from, JWR bird systems. That one is supposed to be better. I haven't been using them much in the warm weather, as I keep the windows open almost all the time. It seems pointless in the summer as it can get pretty humid here.
But I definitely saw a big difference in the winter using them. I have 3 we use, as we have a big house, one near each place Talon spends most of her time.