Virtual Environment

Improve the performance of any building

Integrated Software for Whole-Building Performance Simulation

Used by building design experts around the globe, the Virtual Environment (VE) is a suite of integrated analysis tools for the design and optimization of buildings. The IESVE platform leverages the world-leading simulation engine (APACHE) to allow cross-team collaboration between architects, engineers and contractors, from Schematic Design to Post-Occupancy.

Energy Modelling & Compliance

Tools for fast, accurate, sub-hourly, thermal building simulation of any size or complexity.

Building & HVAC Systems Design

Quick and easy loads calculations and equipment sizing from the earliest stages of design.

Integrated Software

Interoperate with BIM platforms for two-way information exchange and quick digital design.



BIM Interoperability

IES offers unrivalled interoperability with other CAD design and analysis tools. The smooth and robust two-way information exchange between VE and BIM platforms speeds up the design process and facilitates digital design. 


With origins reaching back over 25 years, the technology originally dubbed ‘APplication for Air-Conditioning and Heating Engineers‘ has evolved into a user-interface, rules processor and the best whole-building energy simulation engine in the world.


Some examples of using the VE

Explore how leading innovators like you are harnessing the power of the VE with our interconnected ICL platform


Some useful resources for VE

Introduction to IESVE

New to the VE and need help learning the basics? Our free on-demand course introduces IESVE and some of its key features.

Technical Information

Take a technical tour and get FAQ answers in the Knowledge Base. 

Upskill with IES

Discover our range of free on-demand courses designed to enhance your knowledge and application of our software

Request a Quote

Tell us what you want to achieve and we'll build you a bespoke quotation.