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 for Engineering

Installers for current and historical versions of Tas for Engineers, and additional weather data locations.


Installer for Ecobim, and data files.
Ecobim, sold by Cadline, is a tool for checking the compliance of architectural designs with the UK Building Regulations. For more information, contact Cadline.

Dongle Drivers

Tas for Engineers and Ecobim use USB dongles for licensing. Drivers must be installed before using the software.