Measured Winter Performance of Storm Windows

TitleMeasured Winter Performance of Storm Windows
Publication TypeJournal Article
Year of Publication2002
AuthorsJoseph H Klems
JournalASHRAE Transactions
Volume109, Part 2
Date Published07/2003
Call NumberLBNL-51453

Direct comparison measurements were made between various prime/storm window combinations and a well-weatherstripped, single-hung replacement window with a low-E selective glazing. Measurements were made using an accurate outdoor calorimetric facility with the windows facing north. The double-hung prime window was made intentionally leaky. Nevertheless, heat flows due to air infiltration were found to be small, and performance of the prime/storm combinations was approximately what would be expected from calculations that neglect air infiltration. Prime/low-E storm window combinations performed very similarly to the replacement window. Interestingly, solar heat gain was not negligible, even in north-facing orientation.

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