I bought a house and it came with a Hearthstone II. I rebuilt the stove by taking the top off and replacing the baffle. I have noticed lately that it goes through a lot more wood than I want, usually 15 pieces over a 12-15 hr period. I want to purchase a new, more efficient stove and it has an 8" triple wall that goes from the ceiling of the living room up through the roof. since most new stoves use a 6 inch chimney, how would I install the new stove? when i run my current stove and crack the main air inlet it seems to run at full blast and if i close it down it almost seems to run too cool. which is why i think i am running through too much wood. I hate to get rid of the soapstone, but i want something more efficient. what would you do?