Alright here are some numbers from last winter. First though let me preface this with 2 things: This last winter was terribly cold and our house was much warmer than normal.
Here are a couple charts comparing our utility bills with the temperatures from the past few years.
There was not a huge monetary change in our first 2 months in October and November but December was when it was obvious how much better our utility bill was looking. Any ways the charts pretty much speak for themselves. The grand total this year was $183 not to bad. I was hoping for about $250 but I can live with that. I am hoping for a more normal winter this year so we can really compare apples to apples. At this rate it will take 2 more winters for the chimney to pay for itself but that's not to bad.