I have created a simple model with wit cavities defined as zones. I used trombe wall algorithm in zones in order to study the performance of cavities by changing model north axis. however in one degree increments in degree the outputs of building energy transfer differ significantly ( that is not explainable). Do you have any soloution for my issue?

Thanks for your responses.

I have created a simple model wit cavities defined as zones. I used trombe wall algorithm in zones in order to study the performance of cavities by changing model north axis. however in one degree increments in degree the outputs of building energy transfer differ significantly ( that is not explainable). Do you have any soloution for my issue?

Thanks for your responses.