I have a spread sheet
I think I'm done burning for the year. Maybe a "crisping fire" (to allow me to brush the creosote out of the stove), but not much more.
I burned a bit more generously as I had a full bay from my three-bay three-year shed, and 2 racks of pine at a friend that I could burn. So I burned if it was below 45 F for 24 hrs or more (rather than below 40 F as in previous years).
Yet I did not burn much more wood. Last season I burned 2 cords even (in 5 stacks, oak, oak, ash, cherry, pine), with a little less pine than this year.
This season I burned 1.2 cord of pitch pine, 0.91 cord of red oak, and 0.33 cords of maple (half of which was sticks of 2" dia - what was I thinking back then...) for about 2.1 cords total.
I ran the stove for about 1900 hrs (says the power usage of the fan I run when the cat is hot), using 49.1 kWh in total. Last season this was 2114 hrs
Assuming 76% stove efficiency, and an oil boiler efficiency of 84%, I saved 1014 dollars at $3.32 per gallon (using standard BTU/Cord numbers from some table).
Above my cut off outside temp, I ran the minisplit when needed.
I took 690 kWhs from my bank this winter as per March 1. Last season that was 573 kWh. Assuming the usage is similar (though we had family over for 2 weeks around christmas), that difference should be from the minisplit.
I had a week in February where snow on my panels (fell, thawed a bit but did not slide off and then froze into solid ice) blocked production, and likely added some to our kWh draw.
So, I ran the stove a bit less but used a bit more kWhs from the bank. Despite the higher "stove cut off" temperatures (45 rather than 40 F), I ran it less, evidence of the warmer winter we had.
Due to the "additional external stacks" I had last year and this year I'll again be using 4 year old wood next season, as I will the year there after.
I did realize that I should avoid burning more than one bay a year even if it's a bay of 4 and a bay of 3 years old because that means that 2 years from then I'd be burning wood that's only stacked for 2 years. So I will stay on a three year plan because my shed has finite size and expansion is hard.
I think I'm done burning for the year. Maybe a "crisping fire" (to allow me to brush the creosote out of the stove), but not much more.
I burned a bit more generously as I had a full bay from my three-bay three-year shed, and 2 racks of pine at a friend that I could burn. So I burned if it was below 45 F for 24 hrs or more (rather than below 40 F as in previous years).
Yet I did not burn much more wood. Last season I burned 2 cords even (in 5 stacks, oak, oak, ash, cherry, pine), with a little less pine than this year.
This season I burned 1.2 cord of pitch pine, 0.91 cord of red oak, and 0.33 cords of maple (half of which was sticks of 2" dia - what was I thinking back then...) for about 2.1 cords total.
I ran the stove for about 1900 hrs (says the power usage of the fan I run when the cat is hot), using 49.1 kWh in total. Last season this was 2114 hrs
Assuming 76% stove efficiency, and an oil boiler efficiency of 84%, I saved 1014 dollars at $3.32 per gallon (using standard BTU/Cord numbers from some table).
Above my cut off outside temp, I ran the minisplit when needed.
I took 690 kWhs from my bank this winter as per March 1. Last season that was 573 kWh. Assuming the usage is similar (though we had family over for 2 weeks around christmas), that difference should be from the minisplit.
I had a week in February where snow on my panels (fell, thawed a bit but did not slide off and then froze into solid ice) blocked production, and likely added some to our kWh draw.
So, I ran the stove a bit less but used a bit more kWhs from the bank. Despite the higher "stove cut off" temperatures (45 rather than 40 F), I ran it less, evidence of the warmer winter we had.
Due to the "additional external stacks" I had last year and this year I'll again be using 4 year old wood next season, as I will the year there after.
I did realize that I should avoid burning more than one bay a year even if it's a bay of 4 and a bay of 3 years old because that means that 2 years from then I'd be burning wood that's only stacked for 2 years. So I will stay on a three year plan because my shed has finite size and expansion is hard.