From research to application

Translating research into real-world applications is an essential part of our work. We continuously develop software tools, workflows, and user interfaces to put our research findings into the hands of other researchers and practitioners. Our software tools are free and trusted by many users in leading practices and research institutions.


Eddy is a Computational Fluid Dynamics (CFD) simulation software for natural ventilation and outdoor comfort analysis in buildings. Natural ventilation can significantly reduce cooling loads in buildings, however, modeling a building’s natural ventilation performance remains challeng- ing. Simulations are difficult to set up and due to the many physical and computational variables involved. As a result, the simulations are expensive, and they are usually employed not until the very end of the design process — often resulting in design alterations no longer being feasible. Eddy provides a user interface streamlined for architects and urban designers that is easy to use yet powerful and rich of features to make it easy to conduct natural ventilation simulations from the earliest design stages onwards. Further, Eddy provides optimized of meshing methodologies for urban wind flow models and the generation of wind pressure coefficients for airflow network simulations.

Urbano is a new, easy-to-use, urban design tool that allows you to load urban data from OSM into Rhino. This enables you to build contextual models that can be used for simple visualization and site analysis to complex mobility simulations using the loaded street grids. With v1.2, Urbano supports terrain and allows you to build site models with 3D terrain, buildings, and streets with a single click. The motivation behind the development of Urbano is to facilitate the design of walkable neighborhoods. Urbano allows you to understand the consequences of design choices regarding the street network and the allocation of density, program, and amenities within the urban fab- ric. Urbano introduces three new urban design metrics (Walkscore, Streetscore, and Amenityscore) and novel and fast ways to import and translate urban data into actionable design feedback using a simple trip sending algorithm.


Archsim Energy Modeling is a plugin that, for the first time, brings fully featured EnergyPlus simulations to Rhino/Grasshopper and thus links the EnergyPlus simulation engine with a powerful parametric design and CAD modeling environment. Archsim allows users to effortlessly create complex multi-zone energy models, simulate them and visu- alize results without ever switching between tools. Archsim supports advanced daylighting and shading controls, ventilation modules such as wind and stack natural ventilation, airflow-networks, simple HVAC, photovoltaics and phase changing materials. It is typically used for rap- id early design exploration where building shape, window to wall ratios, facade and glazing systems and passive approaches such as shading and natural ventilation potential are tested for their impact on the build- ing environmental performance and comfort. Simulation inputs such as model geometry, materiality, constructions and zone usage profiles are fully parametric and can be coupled with optimization algorithms within Grasshopper.


Urban Daylight is a novel two-step process that allows designers to simulate and evaluate the daylight potential of urban master plan pro- posals. The initial step computes hourly solar radiation levels on all fa- cades within an urban scene using Radiance/Daysim. The second step converts exterior radiation levels into hourly interior illuminance distribu- tions using a generalized impulse response. Climate-based daylighting metrics, such as daylight autonomy, are also computed. Results match traditional, full raytracing-based predictions within 10% at a fraction of the computational overhead. Given its implementation into the Rhinoc- eros3D environment and the near-instant simulation feedback, the tool is intended as a generative method for designers.


Umi is a Rhino-based design environment for architects and urban planners interested in modeling the environmental performance of neighborhoods and cities with respect to operational and embodied energy use, walkability and daylighting potential. Since 2012, Umi has been developed by the Sustainable Design Lab at the Massachusetts Institute of Technology with support from a National Science Founda- tion EFRI_SEED project, the MIT Energy Initiative, the Kuwait-MIT Cen- ter, the Center for Complex Engineering Systems (CCES) at KACST and MIT, Transsolar Climate Engineering and United Technologies Cor- poration. Further tool developed is now also being conducted at the Environmental Systems Lab at Cornell University. A first public version of Umi was released during a public symposium on Sustainable Urban Design on May 6th 2013 at the Massachusetts Institute of Technology. Version 2.0, which also includes an embodied energy module, was released on November 7th 2014.

Software Video Tutorials

Diurnal Averages Plot

This video shows how to extract data from EPW weather files in Rhino/Grasshopper and plot diurnal average temperatures and radiation levels.

Wind Rose

This video shows how to plot a wind-rose-diagram using an EPW weather file. The plot shows the number of hours wind was measured at a certain speed and direction.

Sun Path Diagram

This video shows how to bake sun path diagram curves into Rhino for further editing.

Overshadowing Simulation-Iterative

This video shows how to set up an overshadowing analysis for the Summer and Winter Solstice as well as the Equinox day.

Solar Form Finding

This video shows a simple technique for solar form-finding using voxels and sun rays. The same method could be used to base form-finding on view corridors etc.

CS Workflow Templates

ClimateStudio Grasshopper workflow templates.

Zone and Window Settings Explained

This video goes over zone and windows settings in detail.

Shoebox Optimization

This video shows a simple shoebox model and how you can reduce the energy demand in the zone. Finally, the measures that reduced the energy use intensity are saved as zone template.

Multizone Model

This video demonstrates how one can set up a multi-zone energy simulation in ClimateStudio for Grasshopper.

Getting to Net-Zero

Building on the multizone energy modeling tutorial, this video demonstrates how on-site renewable energy (PV) can be used to demonstrate NetZero potential.

Interface Overview

How to navigate the ClimateStudio interface in Rhinoceros 3D Download Rhino file

Lighting Model Setup

How to setup a daylight and electric light model Download Rhino file

Daylight Availability Study

How to conduct an annual daylight availability simulation for LEEDv4 credit compliance Download Rhino file

LEEDv4 Daylight Simulation-Iterative

How to conduct multiple iterative studies for LEEDv4 credit compliance Download Rhino file

ClimateStudio Annual Glare Analysis

How to conduct an annual daylight glare probability study throughout a space Download Rhino file

Simple wind analysis

Learn how to run a simple wind analysis with Eddy3D

Multi-directional / annual wind analysis

Learn how to run a multi-directional / annual wind analysis with Eddy3D.

Pressure on building facades

Learn how to display pressure on building facades with Eddy3D.

Step 1 Downloading Map Data

Getting started with building mobility mobility models from OSM

Step 2 Importing and Modeling

Shows how to extract features from OSM maps and how to set up Urbano models

Step 3 Site Analysis

Demonstration of site analysis features building on the previous steps

Step 4 Evaluating Design Scenarios

Shows how modelers can evaluate design scenarios with Urbano

Step 5 Generative Approach

Shows how to use Urbano generatively. Creates new streets based on shortest path.

Workshops, lectures and tutorials

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