In general, how restrictive are horizontal offsets when needed in a return air drop? For instance, you have a straight vertical 14x20 return drop, but it would have to be moved over 6 or 7 inches to the left to compensate for newer equipment.
See attachment below for an idea of what I'm talking about (6-7" offset to left). I am trying to somewhat design or plan out the installation so that it goes smooth. Easier to plan necessary changes ahead than have to worry about them during the install. I have been in contact with the local pros I will be working with.