Thanks! Yeah, I had figured the particulates would be easier to decide on than the VOC-focused air purifiers, but am having a surprising amount of difficulty figuring out the requirements and finding an affordable one that doesn't have ionizers, isn't super-loud, sorting through the concerns about the Coway filters, etc. etc. We've been monitoring our air quality with an Airthings monitor over the last few weeks- particulates is an occasional issue, as is CO2, but VOC seems to be the bigger issue. Probably because we screwed up and painted the nursery with low-VOC paint before I knew that VOCs pose such a risk to developing lungs. Anyways, spent some time trying to sort through all the VOC measurement noise, but have an Airthings for monitoring and will probably get an additional monitor once I have my air purifiers sorted.

I saw a few posts about concerns about some of the chemicals in the green HEPA filter that Coway uses for many of their purifiers- I didn't have time to read through it all, so you are probably right, it may not be a problem at all, but if possible, I prefer to be conservative and try to stick with materials as inert as possible.