We have Airwise purifiers. Our LLMD has them in his office. You change the bulb once a year but there is no filter. They're pricey but quiet
After researching it, and considering price,
we went with 2 Winix 5500
covers 350 sq. feet, pre carbon filter, washable true hepa filter captures 99.97%
no harmful ozone, quiet.
I did not want an ionic.