If it was me I'd keep the DC inside your shop area, you will get some dust from it, even if you went with canister filters theres bound to be a leak somewhere. Then theres the other issue of fresh air, if you suck the air out of the shop and into another room or outside you will need that much air coming into the shop from somewhere. In the winter time for me I need too keep the heat in, so my DC is in the shop, plus I have a Delta air fitration machine and a box fan with a filter on it close to where I'm working, especially if I'm sanding. But even with all that, I've been wearing my dust mask more often. I just can't handle a day of sawdust like I use too. I was dumb to it all for too many years and didn't want to bother with it.