some of the harder plastics used in 3D printing also have a very particular smell. it sort of hints to me &quot;perhaps not be in the same room when it&#x27;s operating&quot; (getting a whiff versus standing there breathing it for an hour), and ventilate after.<p>unless you&#x27;re worried about getting it out in the air at all, also outside. in which case I&#x27;d start with avoiding campfires, (certain types of) barbecues and petitioning your neighbours to stop using their fireplaces, good luck :p<p>and like others said, it&#x27;s not a very high temperature.<p>about that &quot;thing that mgiht be carcinogenic or such&quot;, do you mean phtalates? i might have spelled that wrong, the plastic-softener compound. it&#x27;s not present in equal amounts in all types of plastic, definitely not those intended for food-containers. if it&#x27;s present in higher amounts you can easily smell it, it&#x27;s that particular smell that is on that soft, rubbery, &quot;soft-grip&quot; plastic, especially when it&#x27;s new.<p>btw not even <i>living</i> itself is ever &quot;100% healthy&quot; :) it&#x27;s always a trade-off, and in this case, it seems pretty good, trade-off is for the planet and the children :-)