Heating gas usage and temperature for comparing yearly usage
Does anyone know where I could find a tool that I could use data from my gas bill last year and figure out if I've made gains with insulation to reduce gas usage based on the numer of days at whatever the temperature has been? We moved into our house in November last year just before Thanksgiving, and if I recall I had turned our gas back on just before Halloween (we bought in August, kept the gas off until I fixed a leak)
This would be for SE Michigan, and our gas company is Consumer's Energy. I think I've seen something like this before, but I didn't find it at Consumer's Energy so I'm thinking I must've seen some national energy conservation type site somewhere I can't remember where.
Please do NOT consider any "before" picture of my house as any kind of endorsement of any particular construction method. In fact, you should probably assume that if I post a "before" picture, I am posting it because I am soliciting advice on a proper replacement for one of MANY things done wrong by a previous owner.