I’m having an issue where when entering an override for the ceiling u-value, the program doesn’t calculate the updated heating load. The best I can do is to set the default insulation value to “passive”, for example – which the default ceiling R-value = R55. (I have R50) – and then derate walls and ACH winter infiltration, which does recalculate. 

Does anyone have this issue ? 

Otherwise, as an owner builder, I really like the program