With careful thought and input from members of the forum, I've finished the OAK for my accentra. Overall it was not that hard to do. I was against going through the back wall of the chimney and cement. So I went up the chimney and put (2) fresh air vents along with raising the exhaust pipe. PVC pipe is 2" with (2) holes drilled in top SS plate. I used the Harman OEM outside air kit and added the 3" pipe which I picked up from HD. The PVC piping and the paint I actually had so no cost for the outside addition. Overall it set me back $110. It took about 3 hours overall from start to finish. Not sure if the pics are going to look good but I did attach a few for members of the forum who are contiplating the OAK.