You can call Duquesne Light and have them tell you the average for the past year, when they're other tenants, and you can get an idea as to if something's changed. However, most likely with an old house there's very poor to no insulation. I'm not sure if you own a rent, but you can easily seal cracks and use things like the plastic that you put over windows that you tighten up with a hair dryer. Dryer. It doesn't cost that much money even if your landlord's not willing to reimburse you and it makes a big difference. If you own, it would be good too. See if you can get insulation blown in the walls