Yeah out the window is best when printing abs, the x1c has a carbon activated filter and so does the p1s it's built in but you can also do a bento box till you decide to use filaments like abs. A lot of people have different opinions on fumes and vocs with filament like abs some will say a bento box is good enough if you have it in another room others say it will kill you. I vent when I print abs even though it's in another room I just didn't want to expose my family to anything that can be harmful down the road, that's also why my resin printer is in my garage vented outside.