These ducts will allow you to use a common 12 or 24V 80 mm fan and 3" flexible bathroom exhaust tubing to vent your printing fumes to the outside.
Just enclose your printer and then cut a 3" hole for the fan. Attach the fan to the printer and the round duct to the fan. Then duct tape the flexible tubing to the round duct. At the window end, depending on your window type, just use a piece of plywood and cut a rectangular hole for the window adapter.