I have a Hearthstone Homestead freestanding wood stove. Bought in January 2012. Most every time I open the stove door to add wood, I get an initial little puff of smoke back into the room. I have a vaulted ceiling in the room. Ceiling fan is off. The stove draws well. I open the air intake and slightly crack the loading door to clear any smoke before reloading. I also crack a window and open the woodstove door slowly. The only time it does not emit a puff of smoke is when no wood is "burning", but only coals are glowing orange. My question: Is it typical for a wood stove to emit a brief puff of smoke like that if you are feeding a "burning" fire (flames) and not emit a puff when feeding glowing coals? Thank you. I enjoy reading the posts on the forum.