So what are people using for exhaust extraction during the times when your shop is closed up? Looking online the commercially available automotive extractors are a small fortune and I really don't think I'll need anything that powerful. Thinking about a small squirrel cage blower existing through a shutter type door and some flexible pipe to place in front of the muffler of whatever I'm running/testing.
Don't want to spend a ton of money but I do want something reliable enough to keep the co detectors from going off (oh and to keep my exposure down, yeah, yeah, that one).