.BuildSysPro.IBPSA.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface .BuildSysPro.IBPSA.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurfaceThis model tests the direct solar irradiation received on a ceiling, a wall and a floor. The assert statement will stop the simulation if the floor receives any direct solar irradiation.