@article{23893,
  author = {Dariush K Arasteh and Fredric A Beck and Nehemiah Stone and William DuPont and R. R Christophe Mathis and Michael Koenig},
  title = {Phase I Results of the NFRC U-Value Procedure Validation Project},
  abstract = {<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>},
  year = {1993},
  journal = {ASHRAE Transactions},
  volume = {100, Pt. 1},
  number = {Part 1},
  month = {08/1993},
  language = {eng},
}