Winix 5500-2

“There is a stickied thread in this that goes into detail about dust. Purifiers are not meant to eliminate dust. You need to vacuum with a bagged vacuum and wet dust surfaces as a first line of defense if dust is your issue. Ideally, you would run units in every room, because you are correct, purifiers are bad at pulling air around corners and walls. You should get units that are matched to the size of your rooms. [House Fresh](https://housefresh.com/cadr-calculator/) has a good explainer and calculator you can use to figure it out. You can always start with 1 or 2 purifiers now and add more later. This is just my personal opinion, but I have owned both Winix and Levoit and much prefer my units from Levoit. Also, the circular Winix units they sell at Costco are not good. It’s pretty much the 5500 or go with another brand. Another option would be Coway, but I’ve owned those too and they are great, but much louder than my Levoits. I also appreciate Levoit because they sell a lot of different sizes of units so you can outfit a house pretty easily on a budget.”