Download VE Gaia

IESVE 2023

VE Gaia Installation

Here you can find the installer for the VE Applications suite.  The IESVE Full Installation Package includes both the VE applications installer and the Standard Data and Weather Files installer. Please note you will be given access to VE Gaia only.

IES Virtual Environment 2023 Feature Pack 3 Hotfix 1

Version: 2023
Released: 18th December 2023

Installation Help

Installation Instructions

Stand Alone Installation

  • Download and follow the Set-Up Wizard
  • Launch IESVE
  • Request Licence Keys when prompted
    • Keys will be issued for the software purchased
    • After licences have been issued the “Keys” directory should not be moved
  • Activate software
  • You will now be able to access all purchased IESVE modules

Network Installation

Download Network Installation pdf

Uninstalling or moving our software

If you wish to uninstall or move the IESVE software once keys have been activated please contact us.  You will need to run IES-Clean and generate an Uninstall PIN.  This is required for us to re-issue keys.

Running multiple versions

Multiple versions of our major releases (e.g. VE 2017, 2018 & 2019) can be installed alongside each other. Therefore you do not need to uninstall previous versions if you so wish. However, project files will be automatically upgraded if opened in a newer version.

System Requirements

Like many computer programs, IESVE requires certain hardware and software specifications in order to install and run. These are basic requirements, though you may want to use our recommended suggestions to improve performance.

The following list of requirements and recommendations apply to the current version. 

Supported Environments

  • Windows Vista
  • Windows 7
  • Windows 8
  • Windows 10
  • Windows installations on Mac OS via:
    • VMware Fusion
    • Parallels Desktop
    • Boot Camp

Note: IESVE will run on 64bit versions of Windows, but it will run as a 32bit application. Our Radiance, Microflo and SunCast applications support multithreading.

Software Required

  • Microsoft® Internet Explorer 7.0 or higher
  • .NET Framework 2.0 from Microsoft

Minimum Hardware

  • 1152 x 864 screen resolution
  • Dedicated OpenGL-compliant graphics card
  • 2Ghz+ Intel Pentium / AMD Athlon CPU
  • 2Gb RAM

Recommended Hardware (for large projects)

  • 1280 x 960 screen resolution
  • 256Mb OpenGL v2.1 compliant graphics card
  • Dual core CPU (Intel Core 2, or AMD x2 series)
  • 4Gb RAM

Unsupported Environments

  • Linux
Software Interoperability

Our free interoperability applications are included in the IESVE Applications Suite installation.

Windows installations of the following are needed to use these plug-ins:

  • SketchUp 7.0 or higher
  • SketchUp Pro 7.0 or higher
  • Revit Architecture 2008 or higher
  • Revit MEP 2008 or higher
  • Trelligence Affinity 6

Plug-ins for SketchUp and Revit are automatically installed when host software is present.

Getting Help

Installation Assistance

If you are having any issues with your VE installation, contact our Support team.

Licence Keys

If you are having any issues with requesting license keys, consult our Request License Keys Guide or email

Weather Files

Click here to get the latest weather files for global locations, future climate predictions and CIBSE data for UK Building Regulations Compliance.

Online VE Help

Click here to explore our online VE Help site. Good resources for when you have downloaded the software and are ready to use the VE.

IES Forum

Join the IES VE user community to discuss all things VE, get and share advice with fellow users and share your latest projects.

Any Questions?

If you have any questions please don't hesitate to get in touch with our sales team.