Regarding my question i read this:
Object: Site:GroundTemperature:BuildingSurface
"Otherwise, take the indoor air temperature and subtract 2C as a reasonable starting value to use for most commercial applications in the U.S."
So should I simulate (in my example a 1 zone house) without HVAC (the house is located in europa/germany) - take the averrage monthly room temperature and substract 2C - and this are the values for Site:GroundTemperature:BuildingSurface?
And if there is a HVAC system - same approach (modeling without HVAC, set ground temperature)?
Thank you very much.
For your bonus question; use
OutputControl:Table:Style
and select unit conversionJtoKWH
I would encourage you to separate out the question about units to be an entirely different topic.
Or just delete it from the posting