Thermal Bridging Calculation for Wall U factor of ASHRAE 90.1 OfficeSmall Prototype
Hi,
I calculated the unmitigated and mitigated exterior wall U-factors for the ASHRAE 2019 and 2022 Small Office prototypes due to thermal bridging. As shown below, my calculated U-factors differ from those in the PNNL Small Office prototype. Does anyonmeknow if there are any issues with my calculations? BTW, I used 0.051 as clear-field thermal transmittance of the wall assembly.
Thanks,
Eric Wang
Here is the 90.1-2022 Final Determination report.