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I'm a new EnergyPlus modeller, and I am analysing the hourly and annual heat balances in different components/levels inside my single room model (6 surfaces 4 windows).

When I am analysing the surface outside heat balance, there is often a mismatch in the balance:

The difference is significant especially when the value of the term Surface Outside Face Convection Heat Gain Rate (q''conv), is large.

Why do this difference occur? Is it for convergence reasons? The algorithm in some occasion skip to not match this heat balance?

Thanks in advance.

I'm a new EnergyPlus modeller, and I am analysing the hourly and annual heat balances in different components/levels inside my single room model (6 surfaces 4 windows).

When I am analysing the surface outside heat balance, there is often a mismatch in the balance:

The difference is significant especially when the value of the term Surface Outside Face Convection Heat Gain Rate (q''conv), is large.

Why do this difference occur? Is it for convergence reasons? The algorithm in some occasion skip to not match this heat balance?

Thanks in advance.