IDA ICE (Indoor Climate and Energy) is a new type of simulation tool that takes building performance to another level. It accurately models the building, its systems, and controllers – ensuring the lowest possible energy consumption and the best possible occupant comfort.

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IDA ICE is an innovative and trusted whole-year detailed and dynamic multi-zone simulation application for study of thermal indoor climate as well as the energy consumption of the entire building. The physical models of IDA ICE reflect the latest research and best models available, and the computed results compare well with measured data. While serving a global market, IDA ICE is adapted to local languages and requirements (climate data, standards, special systems, special reports, product and material data).  




The highly anticipated release of IDA ICE 5 is now here! This is a ground-breaking advancement that marks a new era in building performance simulation. In a world where buildings contribute to over a third of global greenhouse gas emissions, the need for sustainable indoor environments with minimal energy consumption and CO2 emissions has never been more critical for the success of the Energy Transition.


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IDA ICE 5 focuses on three primary areas, shaping the future of building design and simulation:

  1. Indoor Climate Predictions: Unleash the power of precise indoor climate predictions with IDA ICE 5, allowing for holistic studies and optimization of both new constructions and refurbishments. Say goodbye to basic standards and siloed approaches—clients now expect optimal results within defined financial and physical boundaries.

  1. Building as an Energy "Prosumer": Explore the revolutionary concept of the building as an energy "prosumer" with IDA ICE 5. Gone are the days when buildings merely met minimum requirements; now, they actively contribute to energy production and efficiency.

  1. Cloud High-Performance Computing Optimization: Using the simulation model for optimizing window properties, supply air temperature or the size and slope of solar collectors has been possible since IDA ICE 4.8. With the virtually unlimited resources in the cloud, hundreds or thousands of cases can now run concurrently, providing quick and cost-effective results.



Some of our customers:

  • Pyry 1 schneider logo 1 srv
  • Arup 1 AECOM 1 danfoss

  • Caverion 1 Granlund 1 Halton
  • Fraunhofer 1 fraport 1 Amsteinwaltert

  • Siemens 1 Skanska SverigeAB 1 WSP
  • gruner 1 INNIUS 1 Julius berger international
  • Sweco 1 COWI 1 flaktwoods

  • epfl 1 mller bbm 1 rewe
  • IKEA 1 grontmij 1 AF

  • RWTH Aachen 1 uponor 1 aalto logo en

  • ncc 1 peab 1 ramboll
  • Ruukki 1 Velux 1

  • Erichsen Horgen 1 norconsult 1 HBI

Key functionalities:



Tools like BIM import and version handling make you more productive.

Import all common 2D and 3D CAD files, including IFC models generated by, e.g. ArchiCAD, Revit, AutoCAD Architecture, and MagiCAD.

A version handling system keeps track on model changes and automatically rerun all cases that depend on a change. The differences are stored and results are effectively compared.



The IDA ICE user interface is designed to make it easy to build and simulate both simple and advanced cases, while still offering the advanced user full flexibility.

You can refine your model in steps, while always providing both 3D graphical and tabular feedback. You work in a single program and may jump back and forth between tasks.



Equation based modelling, using the Modelica-like Neutral Model Format (NMF), makes it straight-forward to quickly expand the software with new modelling capabilities, either by our in-house development team or by the experienced user. The newly created component models can also easily be shared with other IDA ICE users.


IDA ICE is not a black box, which means that we do not ask you to trust our secret model. Every underlying equation can be browsed, and every variable can be logged.

For a single zone, this means that about a thousand temperatures, heat fluxes, CO2-levels, control signals and other variables can be inspected by the critical user.



An advantage of using a modern general-purpose variable time step solver, rather than the hand-coded component subroutines of all other available whole-building simulators, is that it automatically adapts to the nature of the problem. By choice of tolerance parameters, you can effectively eliminate numerical errors and see how the equations truly behave – even with a time resolution of seconds if needed.

Product brochure

Read more about IDA ICE and its great features,
and why it is trusted by the experts.
Download PDF here

     idaice brochure

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