I am going to have to look in there again. I thought someone had said in another post that the air inlet was on the back of the unit, and the air control lever on the front controlled that. We burned all weekend, so will clean it out again and see if I can't get to the bolts to take off that arched piece and see what is holding up the air inlet. We have two dogs so I am wondering if the inlets are clogged with pet hair perhaps. One of our dogs sheds mercilessly so maybe that is our issue. Assuming the baffles need to come out again? If so that sucks, they are a pain to get out for sure.