I live in an apartment without adequate kitchen ventilation. I like doing a lot of wok cooking, which tends to result in enormous amounts of smoke - tripping smoke alarms and getting into all of my stuff. As a solution, I installed a window exhaust fan this summer.
However, it's now wintertime and my place gets very chilly because outside air flows through the fan. I don't want to remove the fan because I don't want to stop using my wok, but I don't want my place to be freezing. I'm looking for some kind of temporary insulation that can be put on and taken off easily.
Does anyone know what I could use for that? I've put a link to the fan below, each side of the housing (that includes the fan opening) is 18 inches and it's 2.5 inches deep. I've looked into a/c insulation products, but they simply aren't the right size. (link also below).