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An Excel spreadsheet (WINVENT) that calculates the temperature distribution across the center of a double-glazed window is described. The spreadsheet was used to model a typical protective glazing installation for a stained glass under both unvented and vented conditions where a vertical channel is created along the entire length of the glazing system. Analysis of data generated by the spreadsheet is used to discuss the merits of protective glazing.
This research was made possible through a cooperative agreement with the National Center for Preservation Technology and Training.