3.6.2 Defining Boundary Conditions for Radiation (Section 13.3.6)

Under Wall Boundary Conditions for the DO Model for semi-transparent walls, the following note should be added after step 1:

1.   Specify the value of the irradiation flux (in W/m $^2$) under Direct or Diffuse Irradiation. If the non-gray DO model is being used, a constant Direct or Diffuse Irradiation can be specified for each band.

Note that the external diffuse irradiation specified when using Radiation or Mixed thermal conditions (selected in the Thermal tab), or Diffuse Irradiation (in the Radiation tab) is always distributed hemi-spherically after transmission through semi-transparent walls (i.e. independent of whether the external semi-transparent boundary wall is defined as a diffusely or specularly reflecting type).