On: Commercial 3D printers emit traces of toxic fumes,...

[alpaca128]

In over a year I've never noticed a smell from PLA during a print. Maybe that varies between manufacturer, some "PLA" filaments are actually weird mixes (like PLA+).

But keeping it in a separate room doesn't hurt.

[zander312 → alpaca128]

I use Prusament PLA and definitely notice a smell. I usually open a window in the room where my Prusa sits.