Many materials with desirable properties (e.g. temperature resistance, strength) can only be printed in a heated enclosure. ABS and Nylon, for example. And if

Many materials with desirable properties (e.g. temperature resistance, strength) can only be printed in a heated enclosure. ABS and Nylon, for example. And if you're printing ABS then you need fume extraction because unlike more common materials, ABS fumes are toxic. It's not strictly necessary for your basic PLA and PETG, but it can help sometimes if the ambient temperature is really low or if the environment is drafty which can cause prints to lift off the bed. See: https://help.prusa3d.com/filament-material-guide https://help.prusa3d.com/filament-material-guide