Abstract
The use of formula to calculate OTTV (Overall Thermal Transfer Value) for buildings in Indonesia is written in the SNI (Indonesia National Standard) 6389:2020 document. There are at least 3 equations and 7 tables that require to refer for calculating the thermal transfer value of the building envelope. The series of formulas is quite time consuming and prone to human error if it is done repeatedly at the building design stage. This study aims to develop an OTTV formula based on the SNI 6389:2020 so that the OTTV calculation process can be carried out more effectively. The formula development process has done using the Autodesk Revit 2019 and Autodesk Dynamo 2.2 applications. From the studies that have been conducted, 11 scripts were written to calculate OTTV semi-automatically.
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