I have a 2 1/2 on American Standard YCC030F1M0BE Gas Pack.
Does anyone know what the name is of the spiral shaped, paperlike material that is located inside the entrance of the heat exchanger at the point where the flame enters into the heat exchanger? It an asbestos like material and makes the flame spiral around as it goes through the tube? Can the unit function properly if you remove this? The reason I ask is that a contractor has told me that one of them, there are three, one in each tube, is broken. He removed it and said that it does not need to be replaced. He is a local American Standard dealer an but this just does not seem right. Any help would be greatly appreciated.