I have recently converted to the LBT 1.4 from the Legacy version. Although I assigned the input parameters the same, the heating and cooling results are very different from each other. Do you think this might be because LBT 1.4 uses a u-factor (single glazed: 5.82) while the Legacy uses a u-value (single glazed: 300) when assigning window custom construction?
I assume some default values are also different since the results are not matching. I used OpenStudio in both cases for energy simulation.