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The overall goal of the National Solar Heating and Cooling Demonstration Program is "to stimulate industrial and commercial capability, including that of small businesses, to produce and distribute solar heating and cooling systems, and through widespread applications, reduce the demand on present fuel supplies." To help achieve this goal, the I Demonstration Act further provides that solar heating and combined heating and cooling j systems will be installed in a substantial number of buildings in the climatic regions existing in the different United States geographic areas. Evaluation of the performance and reliability of the current technology can be expedited by testing under carefully controlled conditions and by demonstration in the field.The purpose of this document is to provide the rationale and description of the data requirements, instrumentation types and data analysis methods used to monitor and evaluate the field demonstration systems.It is recognized that complete instrumentation and subsequent technical evaluation of each system/building/ climate combination cannot be performed because of the cost and data analysis limitations. Therefore, only selected unique installations will be completely instrumented and as the exact design and location of all sites becomes available, optional measurements will be made to evaluate significant features . «This report was prepared as a reference document to prescribe a standard list of thermal performance factors and data analysis methods that can be used to evaluate solar heating and cooling systems for the National Demonstration Program. In describing these factors and the associated measurements, specific solar energy system designs have been identified and their features characterized to illustrate the type and location of sensors. Inclusion of a particular design in this report in no case implies a recommendation or endorsement by the Federal government, and the presentation should not be construed as a certification that any component, subsystem, or system is preferred at the current state of technology development.Similarly, the omission of a component, subsystem, or system does not imply that the capabilities are less than those that are included. The designs presented were obtained primarily from the open literature and are intended to be used for illustration purposes only.The thermal performance data obtained from the Demonstration Program are intended to serve a variety of users including architects, engineers, manufacturers, developers and homeowners, code officials, standards writing organizations, and government planners for energy conservation, economic and building technology applications. An attempt has been made to identify and determine the many factors needed to satisfy the interest and needs of these diversified disciplines. However, recognizing that requirements or technology will change during the course of a five-year program, the evaluation factors and measurements can be modified.

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