Hi Everybody,
I'm having problems with the very easy model attached. I set it up just for practice reasons. The problem:
There is a cube made of double glazing, just the floor is opaque, thin and well insulated. No airchange, internal gains, ... Temperature should rise and stay high during summer days.
It rises but on several days (check e.g. August 10th) room temperature drops below outside air temperature around sunset (see hourly temperature profile). The floor doesn't even touch the ground so temperature should never drop below outside temperature since there isn't transmission losses, either.

Somebody please give me a hint.
Is it possible ecotect is using some algorithms that are not suitable for single day calculations? I also experienced funny results with insolation values on the east compared to the west facade - but only on a daily basis, yearly values are fine.

cheers for any help