Confuse opaque conduction values

Hi everyone!
I am currently running an energy simulation for an office (simple box) in a hot dry climate zone. I was expecting that the envelope will generate heat gains since the temperatures outside will be warmer than the ones inside most of the time.
Why am I getting negative opaque conduction values even in the warmer months? What am I missing?

Opaque conduction (156.2 KB)


Found it! it was the face boundary condition of the ground.
If it is set to adiabatic then the heat losses in the warmer months disappear.

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