Hi,
I created building model in Revit 2017, I conducted an energy analysis and got a report, but I have a few questions.
1. Does Electricity EUI, Fuel EUI and Total EUI refer to primary or final energy?
2. Does the program include thermal bridges? I haven't defined any before.
Thanks for help,
JC
Hi @Anonymous
The EUI results are for energy used on site and not source energy.
When you ask about the program including thermal bridges, I presume you are referring to the overall U-value of a construction. All of the constructions in the Energy Settings dialog do account for thermal bridging when calculating the overall U-value. Many of the Revit constructions do not factor in thermal bridging. This is a legacy issue -- those constructions were created in the Revit libraries before Revit had the capability of performing Energy Analysis. If you are creating your own constructions the best method is to de-rate the U-value of the insulation material as a way of accounting for the thermal bridging.
we have a future improvement in our backlog to revise the existing Revit constructions to account for thermal bridging.
Let us know if you have more questions on this topic, otherwise please accept as a solution so that others can benefit from this information.
Regards,

When you say thermal bridging, do you mean studs in wall cavities (assuming 12, 16, 24" o/c)... or do you mean ratios of wall studs to batt INCLUDING standard ratios for headers/lintels/etc. ... assuming standard construction...
Thanks.
Hi, I wanted to check in on a point in this post from 2024. When I'm given a mean EUI for my Insight building energy analysis, is that mean EUI the site EUI or the Source EUI? I'm using Insight to help check compliance with local energy codes, and I want to make sure I'm comparing apples to apples here.
Thanks,
Lorryn
Hi @lwilhelm4UB2P ,
The Annual Energy Use Intensity is calculated based on the Site energy. So, in case you would like to calculate the Source energy, you can create a custom metric and with the definition of a new factor, such as the Site to Source Energy Conversion Factors per energy type, you can define the Source energy.
Let me know if you need more information or support.
Best,
Giuseppe
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