01168nas a2200133   4500008004100000050001500041245004900056210004900105260002900154490001600183520073800199100002200937856007500959       2002                        eng d  aLBNL-5145300aMeasured Winter Performance of Storm Windows0 aMeasured Winter Performance of Storm Windows  aKansas City, MOc07/20030 v109, Part 23 a<p>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.</p>1 aKlems, Joseph, H.  uhttps://facades.lbl.gov/publications/measured-winter-performance-storm