My printers are in a corner of my basement and luckily there is a window. But opening it just draw cold air from the outside.

So i bought a board of plywood to fit the opening of the window, installed a bathroom fan in it.

WHen i print i open the window and install the board with fan in the opening, plug it in and it sucks air out.

Then i suspended clear plastic curtains from the ceiling (scotched to the ceiling to avoid any air gap) around the printer area.

When i print i leave the door of the basement to let air come in so the fan can push it out.

Works nicely.