So I'm in the process of adding a shop in my basement. Approx. 30'x30'. Framed walls, T1-11 skin, drop ceiling, exterior door entrance. Basically it'll be pretty airtight. There are no windows in this shop. I'll have a dust collector and an overhead collector for the fines. Do I need to provide any type of cross ventilation or is it a good thing that the shop is airtight?