Protect from 3D Printer fumes
Having done 3D printing with ABS myself, I'm familiar with this challenge. You need to exhaust the fumes--that's the long and short of it. Locate the printer near a window, open the window, and have a fan blowing air out the window every time you use the printer. Crack a window on the other side of your house for make-up air purposes.

Or print with PLA, which does not generate nasty fumes. PLA is a nice material and smells a little like popcorn when melted.