OK - first time poster here so be easy on me! I just purchased my first pellet stove (Harman XXV) and I just installed it. Pretty basic install - didn't run into any issues except the outside air kit I bought. The pipe was only 2" and I need 2 3/4" for the stove. While I have read many debates about the need for outside air I think I am forced to install it to be 'code'. I have a window that is 38" from my exhaust and the instructions say that it my be 48" away unless you install outside air and then it is only 18". My question is in regards to the outside air kit. I bought one for $50 and it is basically a piece of flex tube and two clamps - hardly seems worth the money. Has anyone found a cheaper alternative? I read a few people used automotive flex tube and I was wondering how that worked. Any input would be great - also who do I contact to have this thing 'inspected'? Thanks!