Wildfire smoke is exposing millions of Americans to extreme pollution levels
If you want to get an indoor air filter to clean up the toxic air that enters your home, I recommend an industrial solution. Go down to your local indoor growing shop and check out the carbon filters that the pot growers use to scrub the weed smell.Get a filter like this: https://indoorgrowing.com/collections/vortex/products/profil...And pair it with an inline fan to match like this: https://indoorgrowing.com/collections/vortex/products/vortex...That gets you 400CFM of air cleaning power for ~$500. (you can get this stuff for much cheaper used as the margin on indoor pot growing has tanked)Compare to a "designed for the home" air purifier like this: 
https://oransi.com/products/mod-hepa-air-purifierCompared to my proposed industrial solution, the air purifier costs $100 more and is about 1/4 the CFM. The only pluses are that it looks pretty and is roughly 2/3 the DBA when running.