Best for Car and vehicle use

Top pick
Philips - GoPure GP5212
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GermGuardian 743 Sq. ft. Tower Air Purifier with HEPA Pure Filter with activated carbon. It's pretty great!
No I don't hear anything except soft white noise. I love it. I think it was around $70 on Walmart.
With that in mind a germ guardian tower is probably the most affordable good option. Whatever you buy should have UVC light built in to degrade mycotoxins, “plasmawave” or “bipolar ionizer” is also an acceptable alternative just make sure it’s California CARB certified. Stay away from classic ionizer/ozone
End of reviews
Top recommendations from others in the same boat

Top pick
Philips - GoPure GP5212
Top pick
Coway - Airmega 160
Top pick
Coway - Airmega 160
Top pick
Coway - Airmega 160
Top pick
Coway - Airmega 160
Top pick
Coway - Airmega 160