Ok Im back, and another question with our Whitfield Advantage Serial number 55427. We went and purchased a OAK thinking this was the problem with a tall flame, black glass and the pellets filling up in the burnpot. Our question is....when we take out the ashpan we can see the hole for the outside air pipe, however there is a metal plate there. If the old owner didn't use the Outside Air, shouldn't this plate be removed or bent just a bit, looks to us that it wouldn't make any sense installing the OAK up to a metal plate?? Thanks everyone.....