IESVE

IESVE
Name	IESVE
Developer	Integrated Environmental Solutions
Initial release	1997
Latest release	2024
Operating system	Microsoft Windows
Genre	Building performance simulation
License	Commercial

IESVE The IESVE suite is a commercial building performance simulation platform used for whole-building energy modelling, daylighting, thermal comfort, computational fluid dynamics and sustainability assessment. It is employed across architecture, engineering and construction projects by practices and institutions to support compliance with standards, certifications and design optimisation. Major deployments span multinational consultancies, government agencies and academic laboratories.

Overview

IESVE provides an integrated set of tools for simulating building energy use, indoor environmental quality and environmental impacts. Typical users include engineering consultancies such as Arup, Atkins, AECOM, and Buro Happold, architecture firms like Foster + Partners, Zaha Hadid Architects, and research groups at universities including Massachusetts Institute of Technology, University College London, University of Cambridge, and Imperial College London. The platform addresses regulatory frameworks and certifications including LEED, BREEAM, ASHRAE Standard 90.1, EPBD, and Passive House workflows, and is used in projects connected to infrastructure clients like Transport for London and corporate occupiers such as Google and Microsoft.

History and Development

Development began in the late 1990s by Integrated Environmental Solutions, evolving through iterations to incorporate radiosity, thermal network modelling and CFD coupling. The product lineage intersected with efforts from institutions such as Building Research Establishment and collaborations with software vendors like Autodesk and Bentley Systems. Over time releases added compliance modules for legislation in jurisdictions including United Kingdom, United States, European Union, Australia, and Singapore. Academic citations reference early validation studies with test cases from ASHRAE and international comparison exercises involving teams from ETH Zurich and Delft University of Technology.

Features and Modules

Core modules include whole-building energy simulation, daylight analysis, HVAC system modelling, and computational fluid dynamics (CFD). Specific components often referenced are the thermal model, the daylighting engine, the HVAC performance module, and the airflow/CFD solver used in detailed ventilation studies. Integration points and outputs are tailored for standards and tools such as CIBSE, European Committee for Standardization, ISO 13790, and EnergyPlus validation cases. The suite supports scripting and automation compatible with platforms such as Microsoft Excel, Python, and BIM formats linked to Revit, Graphisoft ArchiCAD, and Bentley MicroStation pipelines.

Applications and Use Cases

IESVE is applied in energy masterplanning, retrofit modelling, net zero carbon roadmaps and façade optimisation for projects by developers like Cullinan, Lendlease, and Skanska. Use cases include modelling for high-profile cultural and infrastructure projects by practices such as SOM (Skidmore, Owings & Merrill), Herzog & de Meuron, and Renzo Piano Building Workshop. It supports certification submissions to WELL Building Standard and WiredScore assessments, and is used in municipal climate action planning for authorities like City of New York, London Boroughs, and Sydney City Council. Research applications include coupling with urban microclimate studies involving CERC and climate datasets from organizations like NOAA and Met Office.

Licensing and Deployment

The product is licensed commercially with options for single-user, network, campus and enterprise deployment. Contracts often involve consulting firms, academic licences for universities such as University of Toronto and University of California, Berkeley, and municipal procurement by agencies including Transport for NSW and New York City Department of Buildings. Deployment typically runs on Microsoft Windows environments with considerations for GPU-accelerated CFD and cluster-based batch simulation in data-centres used by firms like AtkinsRéalis.

Integration and Compatibility

IESVE integrates with BIM and CAD ecosystems via formats and connectors for Autodesk Revit, IFC, gbXML, ArchiCAD, and interoperability initiatives promoted by buildingSMART International. Data exchange workflows connect to simulation engines and libraries such as EnergyPlus, Radiance, and third-party CFD packages. It participates in ecosystem workflows with facility management platforms like IBM Maximo and building operations systems from manufacturers like Siemens and Schneider Electric for performance monitoring and digital twin use cases in projects for corporations such as Siemens Energy and Schneider Electric Infrastructure.

Criticisms and Limitations

Critiques commonly address learning curve, model setup complexity, and the need for skilled practitioners from consultancies like AECOM or academic groups at TU Delft to produce defensible results. Comparisons with open-source engines such as OpenStudio and EnergyPlus highlight differences in transparency and extensibility. CFD accuracy and simulation runtimes have prompted users to combine IESVE with high-performance computing resources and validation against wind-tunnel studies at labs like CSTB and Empa. Licensing cost and closed-source components are cited in procurement debates within public authorities including UK Government and municipal sustainability offices.

Category:Building performance simulation software