Winix 5300-2

“A good purifier will definitely collect stuff from the air, but only from the area immediately around the air purifier. You will still have a lot of dust and stuff even in the same room as the purifier, but the filters will also be loaded with crap before long, so you can see that it actually is doing something. You may need several for the same room where you're most concerned about the air quality. The small ones don't do much of anything. You would likely need something like a Winix 5300, 5500, C535, C545 etc. Not sure where you're located, but Costco often has some of them at good prices. If you get one without defects, they're quiet, filters are cheap, and they are often mentioned as the most highest rated air purifiers because of filtration efficiency and affordable price. They're also power efficient. I've also had good luck with Honeywell, despite a lot of people not liking them. The quality has gone downhill in recent years, and they use a lot of electricity compared to the Winix, but they are very efficient at filtration because of their higher speeds. They tend to be on the louder side, and they have only a single pre-filter instead of two. Generally you want to get the largest unit you can get. If on the rare chance it ends up being too large for the room, you can just run it at a lower speed. The smaller ones really won't do very much for you, even if they claim to fit the square footage of the room you're placing it in. You should also make sure the vacuum is a high quality bagged vacuum using multi-layered bags, such as Miele or Sebo. Cheap bagged vacuums, and almost all bagless vacuums will put dust back into the air. The Miele bags act as the filter and have something like 9 layers of filter material so you know that what you suck up stays sucked up. My suggestion would be to pick up a Winix unit and put in your bedroom and start there. But first, give it a good vac and damp wipe surfaces and floors to gather dust and dander. Then run the purifier with the door closed as often as possible.”