Comparison table

Multi-zone, whole-building energy and carbon emission analysis

Dynamic cooling and heating load calculation 

System and plant sizing 

Thermal comfort analysis using view factors (PPD, operative temperature, EN15251)

Light computation (radiosity) for heat balance, thermal comfort and daylight level

Solar penetration and shading animation

Natural and mixed mode ventilation (bulk air flow model)

Hydronic radiators, chilled beams and panels 

3D visualization of input and results 

3D real-time animation of results

Adaptive timesteps (even sub-second resolution if needed)

Fully transparent models (log any variable)

Multiple natural languages 

Early Stage Building Optimization (ESBO) wizard with renewable energy components such as solar collectors, stratified tanks, boreholes, heat pumps, PV, wind turbines, CHP etc.

Replace default plant with ESBO plant

Build free schematics of HVAC, control and envelope objects

Editable AHUs and plants

Parallelization (multi-core processor support)

Parametric runs and optimization

Phase Change Materials

Write your own models using NMF, Neutral Model Format (similar to Modelica)

Version handling system (manage multiple case versions with automatic batch updates)

Full scripting language and easy-to-use graphical scripting

Application Programming Interface

Model difference listing 

Model search 

File comparison functions 

Outline view

Editable GUI forms

IDA Simulation Environment (write your own component models)

Extensions

BIM Import

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Daylight

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ASHRAE 90.1

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Boreholes (beta)

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Ice Rinks and Pools (beta)

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