[cmckn]

I bought one last summer when the air quality outside was terrible (Pacific northwest, fire season yay). It was actually necessary, the air quality in my home had gotten really bad, like to 200 AQI. I don't have asthma, allergies, etc. but my esophagus was irritated and I felt generally awful.

I got the Coway purifier that's currently the Wirecutter pick. It was about $150, has a HEPA filter and an ionizer. The replacement filters are pretty cheap. I leave it on 'auto' in my bedroom 24/7.

Am I getting great benefit from it right now, when the AQI outside is 10? Probably not. Opening your windows for 5 minutes every morning is totally sufficient to keep your indoor air in the green. But it will be great to have around when the inevitable fires start later this summer. If you're in a similar region, pick one up while they're cheap and in stock!