I'd like to install a directvent fireplace in my townhome. There is no association fee so im free to do what i want. The corner of the room is where i want to put it. On the other side is where I havea prefab chimney where an existing vent for my furnace is. There was an option to run another vent for a fireplace when it was built but the previous owner did not run it so I was thinking of just running the vent thru the chimney and out the back. I don't know what the codes are but I have some pics of what im talking about. The sliding glass door is 3 1/2 feet away from the chimney, and the deck above the opening is 8 feet.