I have the IQ Air Plus purifier (I think that's its name) which has 3 filtration systems and one is for VOCs. I am highly chemically sensitive and was not bothered by the plastic smells of this unit for more than a day once unpacked. I see they now have a more expensive serious VOC model on the market too. I have a lot of faith in this company as, when in doubt, go with something European, is my thinking.
One thing to remember with any purifier and VOCs is that the VOC filter will be used up very quickly if you have a particular situation like paint off-gassing for instance. I put my unit into a low-VOC painted room a week before I was moving in and noticed that the filter would inevitably make my place smell like quasi-paint fumes after being on a while. At first I thought I was imagining it, but I called the company and got confirmation that the VOC filter would have been totally saturated from that one week. As soon as I replaced it, it was fine.
When dealing with VOCs now, years after I bought my filter and being wary of its limitations, I'm fixated on trying to avoid them when at all possible. I spent two years looking for a rental that would not have "new paint!, new carpet!" or someone fixing indoor things with heavy-duty Stain-Kilz primers and the like. I live in a boat-making/boat-having community and people seem to be totally immune to the worst things you can find. People here think nothing of using varnish in their homes while living in them, and use lead paint and other monstrous things, it's just nuts.
A couple of helpful things I've found are:
-baking soda (leave it in/on a carpet for several days before using a super Dyson-type vacuum suck it up) for smells
-open trays of crushed charcoal for acute VOCs (and you just replace them every 24 hrs), after all, charcoal is what is in those filters and VOC #s are super high for the first day, week, months after product use
-having carpets professionally cleaned by what must be a truck-mounted cleaner using BioKleen detergent (or another cleaner as sound with an MSDS sheet available to prove it). A company I used understood and took seriously my sensitivities and used a detergent they normally do not use and did several extra fresh water rinses and extra blowers for a week's time and I did not react to the cleaning. There is another company which advertises as doing "natural" carpet cleaning in a dry process and I found out this is basically super-awful indoor dry cleaning. They would not give me any MSDS sheets on their products and that was it for me, and I found out later what a racket the whole thing was.
I realize you didn't ask about carpets, but in case you ever (or anyone who reads these forums) come across this, I spent years finding fixes and solutions. I don't know if it's okay to list certain companies, but allergybuyersclub is where I got my filter from and I like their feedback, specific brands they follow, and clear info on all models. HTH!