Which air purifier to use (if any)?
I have been printing for a couple of months now and I was told that it would be a good thing to have an air purifier to get rid of all the chemicals released while melting plastic when printing.
At the moment I only print PLA, but I want to start moving onto other materials like PETG and maybe nylon, flexibles, etc.
Which air purifier would you recommend (if any)?
I personally wouldn't (and don't) bother with filtering for PLA, PETG and polycarbonate.
ABS, Nylon, etc are a different story. They give off some pretty nasty VOC's when melted.
There are a few off-the-shelf options or you can build your own. Chris Riley of Chris' Basement on YouTube did a good review on one recently.
If you don't print in an enclosure, you'll have a hard time doing anything tangible. That said, If you want to move to the filaments that should have filtration for VOC's, you'll want an enclosure anyway to get successful prints.
I think a room air filter is a good idea in general. From what I've read, a good HEPA filter will remove most of the emissions of concern, provided you maintain the filter. It's not going to capture ALL UFPs, but I'm usually printing with PLA or PETG so don't have a lot of concerns. It definitely helps with the other UFP-generators like laser printers and computers in my office. Keeps the air smelling fresh too, and the UV filter gets rid of some bad stuff. In short: Unless you're going all out on a proper filtration cabinet for your 3D printing, a good HEPA filter is a good compromise.
Thank you so far for the suggestions!
I print as a hobby, so the amount of printing is not that high. However, the printer is right next to me on my desk, so I'm sitting right next to it.
I think that when printing other materials (not PLA), I will probably do that in the evenings or the weekend, when I'm not sitting next to it.
About the enclosure, I don't plan on having one, but would it seriously affect the printing with those other materials? Are they super sensitive to temperature changes?
[...] About the enclosure, I don't plan on having one, but would it seriously affect the printing with those other materials? Are they super sensitive to temperature changes?
It really depends on the material. For ABS, an enclosure is essentially required. Other materials may experience warping with larger prints. In addition to containing fumes, the enclosure can also stabilize temperatures.