A massive drain of hot wather occured in
8.2006
After 12.2006 the value resolution increased, therefor no more big
steps.
Till 12.2006 the values for solargain were corrupted. I applied a
rough estimation.
The environmental- aka Aussen-temperature is averaged over 12 hours
in order to hide the night-day updowns. One may remark the reduced
rooms temp during winter: this allows extended use of the stored solar
heat.