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While Vitro Architectural Glass (formerly PPG) has made a good faith effort to verify the reliability of this computer based tool, it may contain unknown programming errors that may result in incorrect results. The user is encouraged to use good judgment and report any questionable results to Vitro glass for evaluation. The applicability and subsequent results of analysis performed by this tool will be compromised if the user fails to input the correct information. Vitro glass makes no warranty or guarantee as to the results obtained by the user of this tool.