I need to run an outside air supply to my quadrafire pellet stove. It's a castile insert. Can I buy that from just about any stove store? I wasn't sure whether each manufacturer had it's own air supply piping or whether you could buy it anywhere and have it connect up to my stove? My stove has a couple of holes drilled to connect the piping into the stove. Do I need the collar or connector from Quadrafire? Thanks in advance.