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Upgrade Information (What's New in 2025)

Some new and changed features of Revit LT 2025 result in certain behaviors for upgraded models. Review this information before upgrading your models.

Electrical Analytical Elements

Electrical Analytical Elements in Revit LT 2025 have a new parameter "Distribution System". Models upgraded from previous versions will have this parameter set to <None>. When edited in the System Browser, the elements will display invalid connection warnings. In order to remove the warning condition, assign a value to the Distribution System parameter.

During file upgrade, schedules are created for electrical analytical elements with the Distribution System set to <None>. Use these schedules to help you assign distribution systems to these elements.

Room Perimeter Calculations

The method used to calculate room perimeter values has been updated in Revit LT 2025 resulting in improved accuracy. Specifically, perimeter calculations now provide more precise measurements for rooms with inner loop boundaries, accurately accounting for the inner loop perimeter.

Additionally, the method for calculating the perimeter of round rooms or room with arc segments has been enhanced to ensure greater accuracy.

Please note that when upgrading models from earlier versions of Revit LT, it is possible to observe changes in the perimeter values of rooms, depending on the geometry involved.

Parent topic: What's New in Revit LT 2025
Parent topic: What's New in Revit LT 2024
Parent topic: What's New in Revit LT 2023

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