Most of the roof vents that are pictured would be used on industrial buildings. The smokejack could be used for a restaurant. The swamp cooler could be used in a small business like a repair shop in the window or on the side of a wall. While the medium air conditioner could be roof mounted, it is more typically ground mounted like the large one and used at medium sized businesses or offices. I don't see anything there that might be used for an apartment complex. All of the different exhaust stacks are typically used on small to medium industrial structures like a machine shop or a forge. Larger facilities would use multiples of the same kind of vent or stack, not many different ones.