That is a serious amount of money just for heating. I keep our house fairly warm and still only spend a quarter of that (I use natural gas). It's not a huge h

That is a serious amount of money just for heating. I keep our house fairly warm and still only spend a quarter of that (I use natural gas). It's not a huge house, but at 3000sf it isn't tiny, either. At $400/mo I'd be looking for a disconnected duct in the crawl space or something. Or maybe it's an old oil furnace or resistive heat? Even then, that's nuts...