I have a 1500-1600 sq ft. home built in 1950. It’s has medium insulation and all the windows are new. I try to keep my house at 71 degrees with my Warm Morning hand fired stove in my basement, which is tied into my duct work.
For January at our airport per accuweather.com we had 1016 heating degree days this month.
I averaged 69 lbs / day for a total of 2126 lbs this month. That is $196.66 at the $185 per ton I am paying right now. Per every heating degree day, that is $0.20 on average. This is only home heating, not water coil yet. I’m saving over last years natural gas prices (which prices came down since) but my thermostat was at 65. Since I’m just paying to heat my domestic water and cooking my gas bill is low, and the less gas you use the more you pay per cubic foot. So I’m not sure what a 1016 heating degree day gas bill would be with today’s prices, I don't want to find out and be cold at 65. My gas furnace ran just a few times when I came home after being away for 28 hours, and my house got down to 64 degrees.
I am trying to keep the firebox full, and fire slow… that seems like everyone recommendation here. We had some cold days here in PA, and I was keeping the draft at -.06… on days with low wind and lows in the 20s, it was normally at -0.05. I’m going to shoot for more air below and max -.05 this month to see if I can get more heat for less.
I have a lot more work to do to make my system more efficient. I won’t be able to do it overnight, I wish I could. My biggest shortcoming is the lack of a cold air return system. Right now I’m just heating cold basement air, but I am going to build a filter box this month and start warming air that is already warm.