Data (ghost in the machine)...
I did a lot of similar testing last winter.
I turned off my regular heat source, which was a forced air gas furnace, and instead used electric heaters with a kill-a-watt on each heater, logging data about every 4 hours. There were temp fluctuations at night, drifting down until the sun began to rise.
But when I graphed my data (kW/hr vs. Outdoor Temperature), I noticed that there was a much larger variation in kW per hour at various out door temperatures than I had anticipated.
I decided that the humidity of the air, which I was not measuring, plays a much bigger role in heating requirements than I had previously realized...
Regards,
-AC_Hacker
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