I just responded on your comment on the other post so this will be a repeat for you but for everyone else it's new info.

I built a CR box with a decently powered box fan and 4 20"x20" filters. Here is one link. For anyone who still uses reddit, the CRBox community has some cool builds posted with computer fans but, I won't link that because I know most of us don't like going to reddit.

I have noticed less dust overall in my house however, I need new furnace filters, and I've done some drywall work so that less dust was short lived.

Edit to add a wiki link as well.

I used a Winix one I got from Costco and it works well. One caution: air purifiers frequently include ozone generators which do technically clean the air, but ozone is super unhealthy to breathe in.

I don’t notice a reduction in dust and I have a couple particulate filters.

Got a Winix air purifier to help with the wildfire smoke we had a ways back.

I think it helped, kept it going since.

My mistake was buying 2-in-1 humidifier and purifier hybrid without checking the humidity in my area first. Turns out it's already humid enough, and additional humidifying would only cause mold. The hybrid doesn't have purifier-only mode. So I basically wasted money and created ewaste.

I guess my advice would be do your research, and perhaps look up air quality index in your area whether you even need a purifier.

I live in an exceptionally dusty climate and bought one of these. But if you are only noticing dust while vacuuming I don't know that it would matter. Flat surfaces in my space would be notably dusty in under a week while now it takes a couple months.

I would ask about the source first.

Are your air vents dirty? Outdoor pollution? Shedding pets? Fabrics?

An air purifier may be an expensive mask rather than resolving the issue at the source.