Environmental Design Solutions Limited (EDSL) was formed in 1989 to commercially develop Tas Software. EDSL sells Tas software and consultancy services using Tas. EDSL believe that the mixing of development, consultancy and software support leads to a focused software product, with quality support available to end users.

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Tas Engineering


The complete Dynamic Building Simulation package

Tas Engineering has a modular design and is split into three main programs, the 3D Modeller, Building Simulator and Results Viewer. The intuitive Windows interface has features such as undo/redo, drag drop, context menus etc. all making the software more productive and easier to use. The program architecture clearly defines the simulation workflow process facilitating methodical working by the Engineer.


3D Modeller

The 3D Modeller is developed specifically for creating building models for simulation. You can use it to draw buildings that are still only at the rough outline sketch stage, or import CAD drawings to generate more detailed models. From this model you can create rendered 3D views that display comprehensive shading. Tas will even calculate sunshine penetration through the interior of the building between spaces. The model can be exported to 3rd party programs via a 3D dwg export facility.




Building Simulator

Each window, door, ventilator or other aperture has its relative altitude and orientation automatically calculated to give a potential airflow network through the building. This means that natural ventilation is simulated automatically, and you choose which apertures are open, when, and by how much. Dynamic control of apertures can be implemented using control functions.






Results Viewer

Any combination of parameters from any number of Zones and Surfaces can be displayed and compared in a tabular and graphical format.

The unified database system used throughout the package enables external data access by any Automation client (e.g. Word, Excel etc.). Third party applications are able to integrate easily by using the automation interfaces to input and extract data. Even very large simulation data files running into hundreds of megabytes can be manipulated with great speed by this technology.



Comprehensive databases

Construction materials and glazing types can be allocated from the comprehensive databases. These have their dynamic response automatically calculated in the model. The occupation of the building is represented by a calendar, with different day types having varying schedules of use. The final ingredient that brings the building model to life is the climate data used to drive the simulation. Tas Engineering gives you access to over 2,500 recorded weather sites worldwide. The data consists of hourly values for solar, temperature, humidity and wind speed and direction.