I just installed a Hearthstone Heritage stove through an existing fireplace chimney using about 20’ feet of Magnaflux Insulflex chimney liner. I brought the chimney liner directly into the back of the stove using a ss coupler that came with the liner rather than using black stovepipe. Last night I started the first break-in fire where I got the stove up to about 200 degrees then let it cool back down to room temp. This morning, I did the second break-in to let the stove get up to 300 degrees. I noticed that when I adjusted the air control damper all the way to the right (less intake air), the fire still burned pretty well although at a slightly reduced rate. I kinda thought that with the air control all the way to the right, the air supply should be completely shutoff causing the fire to slowly extinguish. Instead, with the air control all the way to the right, the fire continues to burn rather well and I can even hear the air being sucked in the air intake chamber on the back of the stove. Is this normal operation? Should the stove still be sucking in plenty of air with the air control all the way to the right. My last stove, being a Vermont Castings Vigilant, I was able to pretty much close off the air supply causing the fire to distinguish rather quickly. I’m a little leery to fire up the Heritage with a big fire unless I can validate that this is normal operation for this stove.