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Green News:Young Preservationist Proves Replacement Windows Not Better
The window salesman who stopped by the 1917 Dutch Colonial home of Ann and Gary Linley probably has no idea that he was the inspiration for a sixth-grade science fair project. But after 12-year-old Daniel Linley of Elkhart, Ind. overheard his father turn down the salesman’s pitch to replace his historic sash-and-storm windows with new double-paned windows, he had an idea. “I asked my dad why he didn’t buy the new windows, and Dad said our old windows were better,” says Daniel. “I didn’t believe him, so he challenged me to prove him wrong.” With his father’s help, Daniel set out to compare the energy efficiency of windows in their home. They looked at three types: historic storm and sash windows, installed in 1926; single pane, installed in 1952; and double pane windows, installed in 2002. Daniel hypothesized that the newer, double pane windows would hold the most heat. Using the 1952 window as a control, they placed a heat lamp six inches away from the windows and measured both the internal and external temperatures to determine how much heat was escaping through the windows. They tested each window three times after a period of 30 minutes, and performed all their ... more

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