Some observations about heating, insulation and the stove…
The difference between the inside and outside temperatures last year before started to use the stove was 9 or 10 degrees. We would get the temperature up to the low 20’s in the evening with the stove on, then in the morning, it would be as low as 16 or 17 degrees, meaning quite a large overall drop during the night.
So far this year, before we just lit the first fire last night, the temperature difference between inside and outside was something like 12 or 13 degrees. The outside temperature was around 6 degrees for a couple of days in the morning, while inside it was around 19 degrees, giving a 13 degree difference. This was after two very cold days, with clear nights.
Since last winter, we have had the loft hatch replaced with a new and much less draughty one, had the double glazing replaced with new and had the external insulated render installed. The hypothesis is that more heat will be retained within the house and for longer periods. I also hope that less heat will need to be produced in order to raise the temperature inside (due to less heat escaping and less cold air entering).
Last night was the 1st fire of the year. The temperature was 21.6 when we went to bed and in the morning, it was 19.2 degrees, giving a 2.4 degree drop over the 8 or 9 hours with a clear night. The outside temperature this morning was 9 degrees, giving a 10 degree difference.
So, the difference seems to be around 10 degrees still but the temperature drop was only 2.4 degrees, compared to last year when it was something like 6 degrees. Seems like progress but we haven’t had the really cold weather yet!
The other thing i’ve noted is the amount of wood which we just used, out of the stack by the stove. For the 4 hour fire last night, we used about 1/7 of the whole stack, meaning about 7 days (1 week) worth of fires, burning between low and medium heat.