I'd highly recommend putting together one of these very effective and inexpensive ($40?) air filters. Just taping filters together around a box fan. https://en

I'd highly recommend putting together one of these very effective and inexpensive ($40?) air filters. Just taping filters together around a box fan. https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box We used one them during the horrific fires with excellent effect.