Integrated Environmental Solutions (IES) Limited launched version 5.4.1 of its building performance software suite, the, at AHR Expo 2006. Included are new features created specifically for the North American market; an ASHRAE loads calculation tool and the capability to undertake LEED Credit 8.1: Daylighting assessment.

The IES is the world's first commercially available integrated suite of Building Performance simulation tools. Used throughout the world, it is capable of analyzing a wide range of performance issues that impact a building's sustainability, including heat loss/gain, environmental pollution, lifecycle costs, and solar, daylighting and thermal analysis. For more information, visit