Surface heat flux without solar radiation in full heat balance with atmospheric method

i have a question about the surface heat flux without solar radiation in full heat balance method(option 1). when i studying the calheat code, there are many changes between EFDC DSI version and EFDCplus version about the equation, especially 4 parameters(longwave radiation, evaporation, conduction and longwave back radiation). i want to get the references or information about the new calheat equation.
wait your reply.
thanks

Hi,

There are not significant differences between EFDC DSI version and EFDC+ about the equation for full heat balance. Some of the variable names might be different in order to incorporate sigma Zed feature into EFDC+. Other than that there is no significant changes in the equations for the parameters that you mentioned.

Thanks.