Anyone have experience with brands/types of residential or commercial HEPA air purifiers?

This is the purple air site I use for my area outdoor levels, highly recommended:

https://www.purpleair.com/map?opt=1/.../40.836/-124.4
(about an hour south of the Oregon border)

Can see maybe 1/16 mile down the highway in a 65mph zone.

Already have one filter going full blast and another on the way, curious what other west-coasters are doing for indoor air quality.