Hi, I tried doing a search for my question but no results were shown, so I tried going back a few pages and couldn't see my question asked. The bank accepted my offer on a house I put a bid on, so the house is not in my possession... Im strictly in the planning and budgeting phase...assuming all goes as intended. And this is for information as well as advice... in other words I do know my best bet is to call an HVAC specialist and get their advice... but would like to go into it knowing a little bit about what they are going to talk to me about. So, in this house I was thinking of using the breakfast nook, which is near the hallway that connects the bedrooms, and turning it into a bedroom. I don't remember if there was a vent in that area or not, but assuming there isn't... Is it insane to splice the ductwork and run it into the room? I know there is something regarding cfm(?)--don't know what that means but from context clues has to do with sq. footage and what the AC can handle--but since I'm not adding sq ft, would it be possible to splice the ductwork into the "new" room and it not effect the rest of the house? Don't want a window unit. I'm afraid of the bill with those things. It is a single story house... around 1,600 sq ft.