A while back I recall someone calling the vent inside in the front of the Heritage the doghouse. Can understand that as it kind of looks like one. Thing we want to know is how in the world do you keep that clear and how important is it to keep clear. Ours is rarely clear with the wood and ash in there but the stove is buring like a dream... we are concerned that we may be causing a problem somewhere down the line. So what y'all think>