Radiation capabilities in Flow and Flow with HVAC

Hi All,

Basically I would like to know what the difference in capabilities is, WRT radiation in standard Flow Simulation and Flow with the HVAC module. In the product matrix it says that the HVAC module has "advanced radiation" and I would like to know what can be done in standard Flow and what it is that is considered to be advanced radiation?

My understanding for now is that solar radiation can be analyzed in Flow and that absorption in solid bodies can be analyzed in HVAC?

Thanks in advance!

SolidworksFlow Simulation