I know this a relatively common issue, but am looking for any advice. Started our first real fire last night in the Hearthstone Clydesdale insert. Installed in a masonry fireplace, with a full liner, and an insulated block-off plate. Outside chimney, 16-20 feet tall. Not exactly sure. We had it going pretty well, but the house was smoking up nevertheless. It was probably 40F+ outside. I wasn't sure if I started to choke the stove down before or after the smoke was coming in, so I lit another fire this morning for testing. This morning: a few splits (roughly 20-23%, some is 18% and some central portions of fresh splits is 25%..first season burning woes), two bio-bricks to help with greenish wood, primary wide open, stove-top temp between 500-550. Measured under the grille, where HS recommends temp doesn't regularly exceed 600. Looked like I had good secondary burn and it was 35-40F outside throughout this burn. Cick photo for video: Soooooo, smoke was still coming in the house. WHY!? I know draft is the likely culprit, but with a hot fire and relatively low outside temps, what more can I do? When we open an outside door it helps clear the smoke, but I'm not sure if that's from draft improvement or if we're just letting the smoke out. Also, wife notices a correlation between the blower operating the amount of smoke in the house. Thanks for any help.