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A polycyclic aromatic hydrocarbon called retene — emitted from forest fires — causes severe DNA damage. I don't think HEPA filters, like the ones described in this article, remove PAHs in general.

"Pollutant emitted by forest fire causes DNA damage and lung cell death"

https://www.sciencedaily.com/releases/2017/10/171024115604.h...

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A lot of air purifiers come with activates carbon pre-filters that should take care of most volatile organic compounds. I'm not sure how effective they are in practice but this paper suggests that activated carbon is used in aqueous solutions to remove PAH; https://www.ncbi.nlm.nih.gov/pubmed/26820781

So you're probably better off than not buying one of these things

From the article:

"In order to be effective, the activated charcoal filter would have to be a minimum of five pounds to have any statistically significant effect, he said."

I've never seen such a device.

https://www.amazon.com/gp/product/B00D7M6692/

These types of filters get as big as you could possibly want

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