I recently replaced the top bricks in my vermont castings aspen and now the stove burns horribly! The stove was in the house when we purchased it and had only 2 bricks on top. One broke so we were burning with just one. The stove worked fine. After replacing the bricks I can't get the stove hot enough to burn properly and it is now back drafting smoke out of the back of the stove whenever the door is open. I'm thinking about just removing the bricks as it worked fine without them. Not sure if they serve an important purpose or not.