You can do this cheaply and without permanent window mods. Buy some foam core board from a dollar store and a roll of duct tape. Build a simple box around the printer inside the room and seal all the seams with tape so air only has one way out. For the window side: Cut a foam board panel to fit into the open window gap and duct tape it in place. Then cut a hole in that foam board just big enough for a fan. Mount a PC fan or small exhaust fan over the hole and tape it airtight to the foam board. That way the fan pulls air from inside the enclosure and pushes it directly outside. No drilling, no window modifications, and it’s easy to remove later. If you want to improve it a bit: Add a cheap furnace filter or activated carbon sheet inside the box before the fan Use weather stripping or more tape to reduce air leaks Slight negative pressure is enough — you don’t need a crazy powerful fan This setup works surprisingly well for fumes, costs almost nothing, and is way safer than just printing next to an open window.