I have a gas-fired forced air heating system. I removed an interior wall and found a 7" round duct which is now in the middle of the room. I want to move the duct which will require 3 new 90 degree turns. To eliminate 1 or 2 old turns, I'd like to cut a new floor vent into the upstairs bedroom. As expected, the old vent is under a window. The new vent would not be near any window. Will code allow placement of the new vent away from the window and, if so, what are the pros and cons of such placement?