If you're saying you are willing to open up the blacked out windows (i.e., they're not sealed), that seems like the best quickest and cheapest solution to airing out, if as already pointed out you are not especially concerned with dust (loading film holders) or outside airborne contaminants. While I don't work with a lot of different chemicals in my space, I do open up the door occasionally after a printing session if I want to decrease the relative humidity and dry out the space quickly (or when cleaning).