Country Geek
Gold Member
Well, had you installed it back in November, you'd notice a bigger savings. This month has been very warm.
A couple things about trying to find out how much you save... of course, we all know about weather. Cold is cold and warm is warm.
weatherunderground.com is a great source for historical weather data. You can find a station near you and it will give you the number of heating and/or cooling degree days over any historical period that station was reporting. I used it to figure out my propane costs and plan to use it to compare the costs to my new heat pump.