This is the fireplace that I bought and installed 2 years ago thinking that it would save me on my gas bill. The only thing that this pos insert does is let warm air out the chimney, eat wood and belch smoke into the house. THis thing is not air tight either so it goes out about 1 hour after i go to bed and then lets warm air up the flue until i get up in the morning. I was wanting to replace it with a stove, but wood like it to actually heat and burn for up to 8 hours long if that is possible. SO what are some good brands to look at? THis fireplace is located in the center of my house and faces the door to the upstairs so it should heat the house by itself very well right?