Thanks, [this](https://www.nytimes.com/wirecutter/reviews/best-air-purifier...) was a great read from a trustworthy source.

The AP-1512HH sounds like a great buy for most cases, although if you're particularly concerned about VOCs including exhaust fumes (we are - we live in a dense city, close to a main road), the Austin Air HealthMate HM400 is probably what you want. Used by "FEMA and the Red Cross ... for deployment at Ground Zero and the surrounding areas in the aftermath of 9/11", apparently.

Careful with that... Wirecutter is known for recommending whoever gives them the biggest commission.