IES Virtual Environment

IES Virtual Environment Logo

The IES Virtual Environment (IESVE) is a powerful, in-depth suite of building performance analysis tools. It allows the design and operation of comfortable buildings that consume significantly less energy. Whether working on a new build or renovation project, the VE allows designers to test different options, identify best passive solutions, compare low-carbon & renewable technologies, and draw conclusions on energy use, CO2 emissions, occupant comfort, and much more.

There are various tools in the suite; each designed to provide sustainable analysis at levels suitable for different design team members and design stages. All utilise our Apache dynamic thermal simulation engine, and an integrated central data model, which has direct links to SketchUp™, Revit® or Trelligence™, and gbXML, IFC & dxf imports.

VE-Pro is our most comprehensive and detailed toolset. The central data model allows all analysis to be undertaken in an integrated manner, so results can be easily shared amongst applications to further inform and refine simulations. Giving a truly whole building perspective, VE-Pro offers a flexible choice of modules across: Energy, Carbon, Thermal, Solar, Daylight, Light, CFD, Bulk airflow, HVAC, Climate, Egress, Ingress, Value, Cost, and Low Carbon/Renewable strategies.

The VE-Navigators are region specific tools which address Global Rating System and Regulation requirements. They provide a robust and detailed step-by-step structured workflow alongside in-built QA functionality. VE-Navigators for LEED, ASHRAE 90.1 (LEED Energy), LEED-India, BREEAM, Green Star, Green Mark, New Zealand Compliance and UK Compliance tools are currently available.

VE-Gaia is IES’ architectural analysis tool. Its step-by-step workflow system demystifies simulation and allows users to progress from earlier ballpark comparisons into detailed early-stage calculations across: Climate, Bioclimate, Natural resource availability, Building & material characteristics, Solar Shading, Water reduction, Daylighting, Energy, Carbon, Heating/cooling loads, and Potential efficient & renewable technologies. Users can input and manipulate standard data sets or specific building data within the central integrated model.

All IESVE tools integrate easily – for example VE-Gaia users can easily add VE-Pro modules or the VE Navigators for LEED or BREEAM. Screen Shots


Energy Performance, Energy Consumption, LEED, Thermal Simulation, HVAC, Daylighting, Thermal Performance, CFD, Airflow, Heat Gain, Heat Loss, Load Calculation, Solar Shading, Solar Intensity, Occupant Movement, Egress, Ingress, Value, Cost, BREEAM, EPACT, Carbon Reduction, CO2 Emissions, Lighting, Passive Systems, Natural Ventilation, Daylight compensation control, Apache


The IES Virtual Environment meets the following standards and can undertake the following methodologies:

Standards: ASHRAE 140: 2001, 2004, 2007 / BEST TEST / CIBSE TM33 / European Union EN13791: July 2000 / EPACT Qualified

Methodologies: UK National Calculation methodology (NCM) / ASHRAE 55 calculation procedure / ASHRAE 90.1 Appendix G PRM calculation procedure / ASHRAE 62.1 calculation procedure / ISO 7730 calculation procedure.

Expertise Required

Training is required: We offer both face to face and web-based options to allow our clients a complete understanding of the software. Web training can be booked online at IES, Inc. Other support resources include the IES YouTube channel and online support forums.


Global User Base


The Virtual Environment has sustainable analysis tools for all design team members:
VE-Gaia: architect focused
VE-Pro: engineer focused
VE-Navigators: rating system/regulation tools for architects and engineers

Low cost and free IES tools are available to Revit (Architecture and MEP) and SketchUp customers, through VE-Ware and VE-Toolkits, which offer early-stage, quick, iterative sustainable performance analysis using standard data sets.


Geometrical building data may be imported from a range of CAD/BIM systems (e.g. Revit/SketchUp/Trelligence/Vectorworks/Graphisoft) or gbXML, IFC, DXF files. Geometrical models may alternatively be entered using facilities within the Virtual Environment. Input of data relating to materials, occupancy, internal gains, climate, weather files, air movement and systems is managed entirely through graphical interfaces and supported by extensive databases (including pre-defined HVAC component libraries and Manufacturer tools such as Daikin VRV Systems, Monodraught Windcatchers and Termodeck).


Tabular, graphical, video, photorealistic images, colour contoured 3D geometric visualisation of analysis results, full 3D immersive results viewers, fully populated reportage to match LEED / BREEAM / Building regulations and statistical output for energy / daylighting / solar shading all included within the package.

Computer Platform

  • Windows XP
  • Windows Vista
  • Windows 7
  • Windows installations on Mac OS via: VMware Fusion, Parallels Desktop or Boot Camp

Note: IES-VE will run on 64bit versions of Windows, but it will run as a 32bit application

Programming Language

C++ (MFC, STL, .NET), C#, Fortran, HTML, XML, Javascript


  • Comprehensive analysis options offered across a wide range of metrics
  • Simulation results are linked between modules; including across component HVAC system modelling, natural ventilation modelling, CFD analysis, daylight compensation control, solar shading analysis, cost and value assessment
  • Convenient data manipulation coupled with the ability to undertake what-if assessments at the design calculation stage
  • Integrated data model means that design changes are immediately updated elsewhere
  • Unrivalled interoperability with other CAD/BIM platforms


  • Linux environment is not supported





Helix Building
West of Scotland Science Park, Kelvin Campus
Glasgow, Scotland G20 0SP
United Kingdom


+44 (141) 945 8500


+44 (141) 945 8501




Contact IES at the above address or via website. A free 30-day trial is available.