%0 Journal Article
%A Dariush K Arasteh
%A Fredric A Beck
%A Nehemiah Stone
%A William DuPont
%A R. R Christophe Mathis
%A Michael Koenig
%B ASHRAE Transactions
%D 1993
%G eng
%T Phase I Results of the NFRC U-Value Procedure Validation Project
%V 100, Pt. 1
%1 <p>Windows and Daylighting Group</p>
%2 LBL-34270
%8 08/1993
%X <p>The NFRC U-Value Procedure Validation Project was undertaken by a collaborative group of industry, public utility, trade associations, and government researchers in order to validate the testing and calculational methods of the NFRC 100-91: Procedure for Determining Fenestration Product Thermal Properties (Currently Limited to U-Values). This paper summarizes the validation projects goals and test methodology, the results of the data analysis, and the recommendations following completion of Phase I of the project. Simulations performed according to NFRC 100-91 are shown to agree with each other, to within the NFRC tolerance, in 100% of the cases. Window test results with perpendicular wind performed according to NFRC 100-91 are shown to agree with each other, to within the NFRC tolerance, in 84% of the cases. Simulations and perpendicular wind window test results are shown to agree with each other, to within the NFRC tolerance, in 80% of the cases. Testing of skylights was shown to be problematic under the procedure as written at the time. Agreement between tests and simulations will improve as a result of a strong NFRC education and accreditation program.</p>