Recently， I made a sensitivity analysis on building energy heating and cooling consumption about several parameters, such as WWR, SHGC, and thermal conductivity of envelope. I used the simple window system and the solar distribution is FullInteriorAndExterior . However the result was not good, the SHGC became the most significant even stronger than WWR and envelope. So I think there was something wrong enlarging the impact of SHGC. Is there anyone have the similar experience to solve this problem?