I use MedifyAir. For the bedroom there are options of either MA-12 or MA-14 as they cover 203 sq ft in 30 mins. (I use MA-14). They have different size options for your basement maybe get [MA-50-V3.0 Air Purifier](https://medifyair.com/products/ma-50-air-purifier) that covers 1,320 sq ft in 30 mins.
I end up wiping the dust off with a tissue maybe a month or two in, and end up using the filter extra as it fills out more rather than changing every 3 months on the dot. This also depends on use -- if for living room change it on proper schedule if it runs 24/7. I am not sure if there are washable filter options for air filters (only for vacuum cleaners).
I have two [Medify MA-14 air purifier](https://www.amazon.com/dp/B0887WZV3J?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1)s in my home (one upper and one lower level). They were recommended to me by my doctor, who uses them in her office.
As for filters, you can buy the generic ones and they work just as well as the branded, at half the cost. I usually clean each filter once a month, replacing the filter entirely every three months.
I’m a HS teacher and have two desktop air purifiers with HEPA filters (the Medify air ones on Amazon - I change the filters once a semester). I also mask when not at my desk and disinfect during my lunch.
ilovelilacs
