"The chimney is in the center of the house and not on an outside wall," I'm jealous. Most wood burners would love that set up. Two words celling fan. This will get the hot air off the ceiling and down to where you live. Use welders gloves so you don't really become "ONE WITH YOUR STOVE" Get as much insulation into your Attic as possible. seal off the window drafts and door leaks. Heating is not just a stove thing in winter. '