We picked up one of these a few weeks ago. It has a hepa filter. The Dixie Fire has been sending plenty of smoke our way and Buttoning up the house makes things pretty stale. Our AQ index hit 500 the other day and for a couple stayed above 250. I haven’t smoke in 45 yrs, but I was feeling the Camels. Anyway, both my daughters have them and we are all fans of the Winix units. I don’t know other brands but his one has been very good for us. Costco carries them.