alright everyone! Thank you to EVERYONE for your help. I was planning on doing the chimney insulation and block off plate this weekend, but looking at the weather report, i went out last minute like 10 minutes before lowes closed and got a whole package of roxul, and steel. I started last night, i stuffed about 4.5 of these massive pieces into the empty gap of the chimney, and in the walls around the stove. I started the stove from a cold start, and the house has jumped 2 degrees in 30 minutes already. The insulation is holding heat very very well. My block off plate is pretty raunchy so ill redo it in the spring, but i can tell this is going to make a HUGE difference. Thank you everyone!