# Energy annlysis for dynamo

**URL:** <https://forum.dynamobim.com/t/energy-annlysis-for-dynamo/22691>\
**Category:** Packages\
**Tags:** dynamo\
**Created:** [June 11, 2018, 12:02pm UTC](https://forum.dynamobim.com/t/energy-annlysis-for-dynamo/22691 "2018-06-11T12:02:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![1529066993](https://avatars.discourse-cdn.com/v4/letter/1/ee7513/32.png) [@1529066993](https://forum.dynamobim.com/u/1529066993)\
**Post date:** [June 11, 2018, 12:02pm UTC](https://forum.dynamobim.com/t/energy-annlysis-for-dynamo/22691/1 "2018-06-11T12:02:05Z")

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I want to use this package (energy analysis for dynamo) to do energy analysis in Dynamo. However, when I use sample files to create energy model and set surface parameters, the system gives a warning.Revit is version 2018, Dynamo is version 2.0

 ![empty%20list](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/a/f/affb264ca651b13faa85cc5132ab6234d26a34b8.GIF)  
why the result of PrepareEnergyModel.DecomposeZone node is empty? Thank you for your help!

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<div class="post-metadata">

**Author:** ![1529066993](https://avatars.discourse-cdn.com/v4/letter/1/ee7513/32.png) [@1529066993](https://forum.dynamobim.com/u/1529066993)\
**Post date:** [June 11, 2018, 12:10pm UTC](https://forum.dynamobim.com/t/energy-annlysis-for-dynamo/22691/2 "2018-06-11T12:10:56Z")

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![create%20analysis%20zones](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/a/a/aabce0c80253371792339ca35b551176c87c6821.GIF)  
This is a complete node diagram