I ran across a new Tempstar furnace today, as I was called for an odors complaint. This furnace, mid eff., is about 3 mos. old. I noted cylindrical "baffles" at the beginning of the exchanger - LP gas 2stage- And noted the "baffles" were warped from the heat of the flame. My question is, Is this a new "design"? I would think that if there are baffles, they should be located further in, if not at the end of the heat exchanger, to hold in the heat and not at the beginning where there could be combustion problems. Does anyone know what I am rambling on about? - just curious. Everything else checks o.k. ie: Pressure in/out