Depending on your setup, there are ways to run the wires into the room through conduit and straight into the rack. It really depends on how sealed the room is. I always face equipment into an open area, then just circulate air in the rack room with that in the rest of the room. Unless it is a large rack room in which case it may get it's own cooling ductwork.
The biggest thing is to put no less than 1 rack space between every component for proper ventilation and use lots of vtf1 rack panels to allow air to flow above, below, and around equipment.
You definitely have the right idea, but you must take a look at how air will actually flow in the room and through the rack so you are ensured that the cooling fans do the job they need to. My rack is so open right now that I don't even run fans and haven't had any issues at all.