Roo...hello again. Thank you for all of your help last time. Unfortunately, I'm still not getting great heat. I moved into the house (3,500 square feet in total) 2 years ago. In 2004-2005 I used approx. 1,400 gallons of oil ($3,000). In 2005-2006 I used approx 1,200 gallons ($3,000). Milder winter in 2005-2006, but higher oil prices. The house is only 5 years old. As far as I can tell there seems to insulation in the outer walls and in the cathedral ceiling. I had a ceiling fan installed in the cathedral ceiling (I thought that was the problem at first) and there was insulation in the ceiling. I was careful to cover the hole pretty good before I sealed it up to avoid drafts. The Hearth is made of stone, all the way up to the ceiling. On each side of the Hearth there is a hole into the fireplace. I'm not sure why. Neither did the local building inspector. Possibly for venting. There is also a vent on the outside of the house off the chimney (directly off to the side of the firebox). Could this vent be effecting the performance? I have the Summit blower on automatic. It kicks on/off when it reaches a certain temps. It usually shuts the blower off within a couple of hours of feeding the stove. On overnight burns, it's rare that the blower is still going in the morning. I haven't monitored outside temp vs shut down, but for the most part, it only stays on a couple of hours from the point that I put my last logs in.