Plugin for Revit


The plugin is no longer available, you have a new possibility on Revit:

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For customers that have the licence

In collaboration with the company Mensch und Maschine, we developed a version of Eco-Sai (with Eco-Sai 4.0 motor) that is compatible with the CAO Autodesk® Revit® software.

Licence price (= 1 activation) : 300 CHF HT


Download and install the plugin from this link:
               Install USai Plugin for Revit 2015
               Install USai Plugin for Revit 2016
               Install USai Plugin for Revit 2017
               Install USai Plugin for Revit 2018
               Install USai Plugin for Revit 2019
               Install USai Plugin for Revit 2020
               Install USai Plugin for Revit 2021
               Install USai Plugin for Revit 2022 (new)

Explanation film: download



The Revit USai Plugin features:
  • Heat transfer coefficient calculation for both homogeneous and inhomogeneous walls, including effects of in-floor heating and plane air cavities (SIA180, EN ISO 6946)
  • The dynamic thermal characteristics of the wall are accounted for according to the EN ISO 13786 standard (damping factor, dynamic heat transfer coefficient, thermal admittance)
  • Calculates the risk of internal condensation and the quantity of condensate according to the EN ISO 13788, EN ISO 6946 and SIA180 standards
  • Life Cycle Assessment calculation following the SIA2032 standard
  • Connection to the database
  • Results presented in both graphical and numerical form
  • Can calculate the annexes from the EN ISO 6946 (mechanical fixation and air)
  • Compatible with Lesosai (from version 2015) :


  • Multilanguage capability: English, French, German, Italian


Picture example:


To use only with Autodesk Revit

Supported operating systems: Windows Vista and above. Use on a Mac OS X system possible with a Windows emulator.


Contact: software[at]