REX Heat Load

REX Heat Load is an add-on that extends use of the Autodesk Revit MEP software. The extension enables calculation of design heat losses and design heat loads in accordance with EN 12831.

By default, design in Autodesk Revit MEP is based on the ASHRAE standards. Thus results of heat loads calculation differ significantly to those based on EN 12831.

Therefore, where accordance with European codes is required, values calculated with REX Heat Load can be used for design of heating systems in buildings – e.g. to select appropriate mechanical equipment as radiators, boilers, etc. and then implement them into the Autodesk Revit MEP model.

Moreover, calculation results received with REX Heat Load are saved in the Autodesk Revit MEP model and can be used later e.g. for schedules or space tags.

REX Heat Load automatically imports data from Autodesk Revit MEP. Therefore spaces and zones should be defined in the Autodesk software prior to the use of  the REX Heat Load add-on.

Key features

  • calculation in accordance with the EN 12831 code
  • retrieval of model geometry from Autodesk Revit MEP
  • collection vent stream from an Autodesk Revit MEP model
  • calculation of unheated room temperature
  • modification of data retrieved from an Autodesk Revit MEP model
  • instant brief reporting for a quick check of the correctness of results
  • complete data report
  • export and storing of calculation results in Autodesk Revit MEP objects
  • interactive graphical viewer of a building
  • intuitive and legible interface



We use cookies to improve our website and your experience when using it. Cookies used for the essential operation of the site have already been set. To find out more about the cookies we use and how to delete them, see our privacy policy.

I accept cookies from this site.