The overall goal of Task 22 was to establish a sound technical basis for analyzing solar, low-energy buildings with available and emerging building energy analysis tools. This goal was pursued by accomplishing the following objectives:

• Assess the accuracy of available building energy analysis tools in predicting the performance of widely used solar and low-energy concepts;
• Collect and document engineering models of widely used solar and low-energy concepts for use in the next generation building energy analysis tools; and
• Assess and document the impact (value) of improved building energy analysis tools in analyzing solar, low-energy buildings; and widely disseminate research results to tool users, industry associations, and government agencies.